Sergio Perez admitted to mixed feelings on Wednesday as he returned to Monaco.

The last time he was in the Principality to race – for his debut grand prix in the fabled Principality – he was hauled away in an ambulance, having been knocked unconscious in a huge qualifying crash.

“To me it’s unbelievable to be back here after such an accident,” the 22-year-old said on Wednesday, according to Germany’s Auto Motor und Sport.

Mexican Perez said Monaco is still his favourite track.

“It is definitely not a good feeling that the walls are so close, but we know the risks. It’s a special place.

“I can remember everything right up to the crash. The next thing I know was that I was on the way to hospital — I was unconscious for several minutes.

“After such an accident it is not easy to come back — I cannot say for sure how I will feel when I come out of the tunnel for the first time. But I think it will be completely out of my head.”

Perez said he really needed “four or five” races to recover from the heavy concussion, but that there was pressure from sponsors to come back as soon as possible.

“I wanted to get back into the car in Montreal, but it was impossible,” he recalled.

“In Valencia it was very difficult for me.”

Now, he is hoping for a very different Monaco weekend, after looking strong last year until his crash.

“Our goal must be the podium. I hope to find a good setup although we have recently had a little problem with the traction.

“We are so close to the top that every tenth can make a difference.

“After our second place in Malaysia, maybe the next step will be victory — I don’t know if we will succeed. But the opportunities are there,” said Perez.

Ross Brawn revealed on Wednesday he missed the recent Spanish grand prix to have checks on his heart.

After handing over to his Mercedes deputy Nick Fry in Barcelona, fellow Briton Brawn is back in action as the team boss in Monte Carlo.

Rumours hinted there was more to the story, but Brawn insisted to a German newspaper earlier on Wednesday that he was simply advised by doctors to take the weekend off after a night in hospital for checks.

He then told reporters in Monaco his symptoms had been “arrhythmia”, or an irregular heartbeat, insisting he is “back to normal now”.

Brawn, 57, joked the heart problem was triggered by watching an exciting football game on television.

There is trouble afoot at Monza, the scene of the famous and historic Italian grand prix.

On Tuesday morning, Italy’s finance police the Guardia di Finanza entered the Autodromo Nazionale to investigate seven people involved with the operation of the circuit.

According to Il Giorno and La Repubblica, the Monza prosecutor suspects tax offenses, false invoicing and other discrepancies in relation to Sias SpA, the circuit operator, between 2007 and 2012.

Among the suspected offenses is the issuing of invoices for non-existent transactions in order to show a positive balance sheet for the running of some events.

The officers raided the Sias offices and also the home of the circuit director, Enrico Ferrari, and other high ranking officials.

A favourite for victory this weekend, Pastor Maldonado is reportedly lucky to be gearing up to race in the Principality at all.

Bild newspaper recalls that the Venezuelan, who defied his ‘pay driver’ critics by winning for Williams in Spain two weeks ago, was actually banned after an horror incident on the streets of Monte Carlo seven years ago.

Racing in the Renault World Series in 2005, the then 25-year-old ignored yellow flags before striking and severely injuring a marshal.

Organisers of the Monaco grand prix reacted by banning Maldonado from the street circuit for life.

Germany’s Bild revealed that Maldonado’s wealthy father intervened, promising to pay for the marshal’s recovery and rehabilitation from a broken back.

That intervention saved Maldonado’s future formula one career, as no team would hire a regular driver that cannot participate in the sport’s most famous race.

Maldonado is therefore a favourite for victory this weekend, with his Williams now acknowledged as arguably the best in the entire field when it comes to slow-speed traction.

And in his four seasons of GP2 between 2007 and 2010, Maldonado finished on the podium each time, winning and achieving pole position twice. In 2006, he won in Formula Renault.

Last year, in qualifying for his first Monaco grand prix, he qualified his then struggling Williams in eighth place, comfortably ahead of Rubens Barrichello.

“He is very good at Monaco,” agreed Barrichello.

In the 2011 race, Maldonado was fighting for fifth when he crashed with Lewis Hamilton.

“If the last sector in Barcelona is the marker, then the Williams will be unbeatable in Monte Carlo,” Germany’s Auto Motor und Sport quotes Dr Helmut Marko as saying.

The breakthrough success in Barcelona has piqued the interest of Maldonado’s native Venezuela, having not had an F1 points scorer since the ignominious Johnny Cecotto in 1983.

“My country will be following every second of the next race,” Maldonado is quoted by O Estado de S.Paulo newspaper.

“I love street circuits, this one in particular. My style of driving fits perfectly with Monaco. I am ready to get another great result.”

Ross Brawn should be firing on all cylinders as he returns to the pitwall in Monaco this weekend.

Mercedes’ team principal sat out the recent Spanish grand prix due to illness, but a scarcity of extra information triggered speculation.

One rumour was that he is seriously ill, whilst another was that his absence may in fact be due to his German employer’s high-stakes spat with Bernie Ecclestone.

The latter theory gained traction since Barcelona, with acting team boss Nick Fry taking a much higher than usual profile, including naming Paul di Resta as a possible 2013 successor for Michael Schumacher.

Explaining his absence, Brawn told Bild newspaper: “On the Tuesday before Barcelona I felt unwell so I went to the doctor and then stayed a night in hospital for some tests.

“When I got home, I decided on the advice of doctors to give myself a weekend off, to be sure that I am fit for Monaco,” the Briton said.

Partly because of Brawn’s deputy Fry’s recent comments, and also due to his paltry points tally and his crash with Bruno Senna, rumours about Schumacher’s future have intensified since Spain.

“A lot has been said and written,” acknowledged Brawn, “but we should not forget that we – the team – have let him down in three of the fives races, not delivering the job we should have.

“We must do better,” Brawn, who worked closely with Schumacher during the seven time world champion’s ultra successful Ferrari era, added.

“We saw Michael’s real quality again in the first race, so it’s for that reason that I believe we will see him on the podium this year.”

As for a possible contract extension for the 43-year-old, Brawn insisted: “When the time comes, we will sit down together and talk about the future.

“I’m sure it will become clear very quickly in what direction we will go.”

Vitaly Petrov thinks it is possible Felipe Massa will lose his Ferrari seat long before the 2012 season is over.

But Caterham’s Russian driver, who moved from Renault (now Lotus) at the end of last season, does not believe reports that Ferrari could sack the struggling Brazilian imminently, such as after next weekend’s Monaco grand prix.

“I don’t think they’ll fire Massa just now. At least not until August,” Petrov is quoted by the state owned Moscow news agency Ria Novosti.

There are six races until August’s month-long calendar ‘summer’ break.

So while Petrov thinks Massa’s career is genuinely in danger, he does not agree that Ferrari is ramping up the pressure on the 30-year-old.

“I wouldn’t say that Ferrari are criticising him that strongly,” he said. “They’re not saying he has one more chance or anything like that.”

Ferrari has played down rumours it is close to immediately ousting Felipe Massa, insisting it is possible the struggling Brazilian will still be in a red car next year.

On Twitter, the famous Italian team said the latest rumours – including a claim that former Virgin driver Jerome d’Ambrosio is a candidate to replace Massa in 2012 – are “funny”.

But it was Ferrari itself who fuelled the speculation, publishing a statement on its website that read like a warning to Massa.

“It was a very carefully-worded statement, wasn’t it?” said Telegraph correspondent Tom Cary.

“The way this crazy season is going, I really would not be massively shocked if they ditched him mid-season.”

The Swiss newspaper Blick said Monaco next weekend could be the 30-year-old’s last chance to up his game.

And the candidates are lining up.

“Ferrari knows that I’m ready. If they need me or they want me, then they will call me,” Adrian Sutil, who accompanied his manager to last weekend’s Spanish grand prix, said.

The Spanish newspaper El Mundo said some paddock pundits believe “the only reason” Massa still has its seat is because the “name Todt” – a reference not only to Massa’s manager Nicolas but to the FIA president – has a “protective arm” around him.

Ferrari spokesman Luca Colajanni told Brazil’s O Estado de S.Paulo newspaper this week: “Felipe has the full confidence of the team, starting with our president.

“We have not decided who will be our driver in 2013 but Felipe is not ruled out,” he insisted.

Indeed, while some believe Ferrari has hung a sword of Damocles above Massa’s head, others think the Maranello based team have been patient since the Paulista’s recovery from his near-fatal head injuries of 2009.

“We have no evidence that makes us think that Felipe has slowed down because of the accident. Zero,” Colajanni said.

F1 doctor Gary Hartstein agreed: “An experience like that (Hungary 2009) changes you, but you can’t say that’s why Felipe has not won again.”

Charlie Whiting has defended the decision in Spain to move Lewis Hamilton from pole to the very rear of the grid.

Although McLaren was widely criticised for making a grave error, the stewards’ penalty was at the same time described by the world’s press as “draconian”.

“Quite frankly I did not expect the penalty that we received,” said McLaren team boss Martin Whitmarsh.

Indeed, given that McLaren’s fuel indiscretion occurred only in the decisive Q3, why not simply delete Hamilton’s Q3 laptimes, thereby putting the Briton mid-grid for the race?

“We had no room to move,” Whiting, the FIA’s race director, responded to Germany’s Auto Motor und Sport when told that Hamilton’s penalty seemed too severe.

“If there is a violation, it applies to the whole session, not just part of it,” he insisted. “Qualifying begins with Q1.”

Whiting explained that if Hamilton had only lost his Q3 time, a precedent would have been set tempting teams to risk not being checked for the mandatory 1 litre fuel sample in post-qualifying scrutineering.

Auto Motor und Sport said only one or two fuel samples are actually checked after qualifying at grands prix.

Competitors could, therefore, genuinely “run the risk” of using less fuel than is allowed in Q3, if the penalty for being caught is relatively light, Whiting argued.

He recalled last year’s German grand prix, when Sebastien Buemi was sent to the back of the grid because his fuel sample showed irregularities.

As it was not possible to check if the illegal fuel had also been used in Q1 and Q2, the Toro Rosso driver had to be disqualified from qualifying, Whiting argued.

The oddest element of the 2012 season so far is that the unlikeliest of candidates could now be genuine title contenders.

Before the Spanish grand prix weekend, Pastor Maldonado was a commonly derided ‘pay driver’ with 500-1 odds of winning in Barcelona, and just a single point to his name in 2011.

Now, he is F1′s newest pole-getter and race victor, and genuinely regarded as a potential contender for the world championship.

And Dr Helmut Marko, the reigning world champion Red Bull’s motor racing manager, said: “If the Williams really has traction that good, then Maldonado will run rings around everyone in Monte Carlo,” he is quoted by Auto Motor und Sport.

Maldonado travelled straight from Spain to Caracus, where he was being quizzed by the local media as to his chances of a back-to-back victory repeat in Monaco next weekend.

“I think it’s going to be a great opportunity for us to be strong again,” he said.

Sebastian Vettel has defended his former mentor Michael Schumacher.

The seven time world champion has been roundly criticised since last Sunday’s Spanish grand prix, after crashing into Williams’ Bruno Senna at the end of the Barcelona straight.

He called the Brazilian driver an “idiot” on the radio and later defended the outburst, but the FIA did not agree, imposing a five-place qualifying penalty for Monte Carlo for causing a collision.

“For us, that manoeuvre of Michael’s cost us a lot,” Red Bull team principal Christian Horner said on Austrian Servus TV.

He said the debris from the crash not only damaged Vettel’s front wing, but led to the reigning world champion having to serve a drive-through penalty due to activating his DRS wing in the yellow-flag zone.

German Vettel, however, defended Schumacher.

“In those situations we don’t have much time of course,” he said, “and you can get very great speed differences (between the cars) on the straights.

“I think it should be classified simply in the category of racing accidents. Unfortunately it happens,” said the reigning world champion.

“Of course you can always say what is what afterwards,” added Vettel, “just as you can say that it always takes two to tango.”

Mercedes’ Norbert Haug was less eager to comment, although he did tell Germany’s Sport1 that the team “accepts the verdict of the race stewards”.

Preparations for the inaugural Russian grand prix in 2014 appear to have hit a roadblock.

We reported last weekend that rumours were circulating in the Barcelona paddock that the Sochi race now appears “doomed”.

The state owned Moscow news agency Ria Novosti now reports that political issues have created “serious delays” in the race’s preparations, according to an adviser with the Russian Automobile Federation.

The official, Igor Yermilin, insisted that the project is not doomed, but he said very few efforts have taken place following the bureaucratic reshuffling of the local Krasnodar region.

He said some officials of the Omega company, responsible for the F1 circuit project, have lost their jobs.

“In the Krasnodar region there has been have been quite serious changes in the leadership,” Yermilin said, “including people from Omega who signed the contract on holding the Russian grand prix”.

The coastal city Sochi is also scheduled to host the 2014 Winter Olympics.

“The main thing at the moment is the Olympics — the grand prix is on the back burner,” said Yermilin.

Five races in, F1′s cleverest brains are still yet to decode the mystery of the bizarre and fascinating 2012 season.

As was the case when he utterly dominated last year, Sebastian Vettel is still leading the drivers’ points chase.

But, before last weekend, if he had been told that Williams’ Pastor Maldonado would be the winner of the Spanish grand prix, the German admitted: “Well, I would have put a lot of money on them!

“I think the odds weren’t bad,” he smiled.

Indeed, the major British bookmaker William Hill was taking bets at 500-1 prior to the Barcelona weekend.

A spokesman confirmed that only two bets at 10 pounds or above were placed on Maldonado prior to qualifying.

“I’m sure Williams don’t understand why they just won the race here,” McLaren’s Jenson Button is quoted by the Guardian newspaper.

But the previously-derided ‘pay driver’ Maldonado is not the only potential new winner in 2012, after Jenson Button, Fernando Alonso, Nico Rosberg and Vettel won the opening four grands prix.

A detailed look at F1′s specialist reporting in the past few weeks shows that Lewis Hamilton, Mark Webber, Kimi Raikkonen, Romain Grosjean, Michael Schumacher, Sergio Perez and Kamui Kobayashi are all also widely regarded as genuine victory candidates in 2012.

And given that their teammates have won grands prix this season, even the struggling Felipe Massa and Bruno Senna should be added to that list.

“Dammit, let’s go for (HRT’s) Karthikeyan!” wrote Chris Hockley in the Sun newspaper.

“It’s really quite crazy right now,” Vettel, who despite his young age would count himself among F1′s currently perplexed purists, told Germany’s Auto Motor und Sport.

“What’s happening is difficult for us to explain,” he added.

The situation has split the F1 audience, with the purists shaking their heads, and others marvelling at the unprecedented spectacle.

“The spectacle has taken over the sport,” said the Paris daily Le Figaro.

“Even the teams can’t be sure who will be the hare and who will be the tortoise at any given track,” wrote Hockley.

Alonso, who is the joint championship leader, is in the purists’ camp.

“Of course it is attractive for the spectators that we are going to Monaco not knowing if we will fight for victory or be left out of the points,” he is quoted by El Pais.

“But in a way, after eleven years in formula one and now I’m at Ferrari, I would like to have more stability,” the Spaniard admitted.

Sir Jackie Stewart said: “What’s going on is unbelievable, which I think is the outcome of the new rules, new tyres — I think it’s many factors,” he told the Spanish sports daily AS.

“What’s happening,” said Maldonado’s race engineer Xevi Pujolar, “is that these tyres are allowing teams who do not have the biggest budgets to be eligible for really good results.

“The reason is that the most important thing now is to have a good setup and also some luck with the temperature.”

Pirelli, F1′s tyre maker, has received both criticism and praise for its huge role.

“Pirelli have been both bold and brave,” Sun journalist Hockley said. “It can’t be easy for a manufacturer to make tyres that sometimes wear out faster than you can say Mercedes.”

Marco Tronchetti Provera, the Italian marque’s company chief, is unapologetic.

“What we have provided is what the teams have asked for, and it was not easy,” Italian language reports quote him saying. “Our engineers have done an extraordinary thing.”

Felipe Massa’s formula one career is on the brink of collapse.

Ferrari boss Stefano Domenicali left Barcelona insisting he expects the struggling Brazilian to “fight back starting in Monaco”.

“We absolutely need his points to also fight for the constructors’ title,” he said.

Earlier, the Maranello based team said on Twitter that Ferrari is “disappointed with” the 30-year-old’s performance.

When asked about that comment, a Ferrari spokesman told the Sunday Times: “It was a poor choice of grammar. We are disappointed in the outcome of Felipe but not with Felipe himself.”

But the very latest development is that Ferrari is now making it abundantly clear that Massa needs to up his game immediately.

In a statement posted on its official website, Ferrari said Massa’s teammate Fernando Alonso “has always maintained a very high level”.

As for Massa, his “drop off has made itself felt”, the report stated.

“The Brazilian had picked up 49 points two years ago and 24 the following year, while so far this season he has just 2,” said Ferrari.

“Everyone, he more than anyone, is expecting a change of gear starting right away with the Monaco grand prix”, the statement concluded.

Even Massa’s strongest supporters in Brazil, like the O Globo journalist Celso Itibere, admit the situation is dire.

“He is at risk,” said Itibere, “his decline is progressive, he is failing to react and he runs the real risk of not finishing the season.

“At this time Ferrari has no one to take the job. Everyone they would like to have there – Perez, Kobayashi, Webber – are not available.”

Tuesday’s edition of the Italian sports daily Corriere dello Sport will report that Massa’s ousting is imminent.

And the latest edition of La Gazzetta dello Sport did not even once mention Massa’s name. “It is as though he does not exist,” wrote the Brazilian journalist Livio Oricchio in O Estado de S.Paulo newspaper.

“Yet it is an Italian newspaper, and he is a Ferrari driver.”

When asked if he fears for his F1 career, Massa said in Barcelona last weekend: “No. I live in the present. What will happen will happen.”

Asked if he is afraid another bad performance will seal his fate, Massa insisted: “I’m not afraid of anything, especially criticism. It doesn’t affect me.”

Two days after winning in Spain, Williams is scrambling to put together the equipment it needs to contest next weekend’s Monaco grand prix.

Mere hours after Pastor Maldonado secured the once-great British team’s first victory since 2004, a huge fire broke out in the pits, leaving one team member still in a Barcelona hospital with burns.

“His family are in constant communication and he is in good spirits,” Williams said in a media statement.

The Oxfordshire based team is now making efforts to ensure it can race in Monte Carlo, having lost a lot of equipment in the fire.

Mercifully, however, Bruno Senna’s car appears to have survived, with the Finnish broadcaster MTV3 saying an initial inspection of the chassis showed no devastating damage.

Maldonado’s winning car was in parc ferme at the time of the incident.

“We had a lot of damage and lost a lot of equipment, including IT equipment,” chief operations engineer Mark Gillan said, according to the Daily Mail.

“Over the next couple of days we will be looking at where we are parts-wise.

“We will have everything we need to run operationally at Monaco, but we may be missing a few of the extras because obviously we don’t carry a complete set of spares for everything,” he said.

It is believed more than one rival team has offered to help Williams by loaning the Sir Frank Williams-led outfit any equipment it needs.

A McLaren spokesman confirmed the Woking based team has offered to help.

Germany’s Bild newspaper said Williams’ damage bill runs into the millions.

Team manager Dickie Stanford denied a rumour the fire was caused by a cigarette in the vicinity of Senna’s fuel tank while it was being emptied.

“We don’t know the cause, but we would never allow smoking in the pits,” he insisted.

Williams and F1′s governing FIA are investigating.

F1′s astonishing season continues to live up to the hype, as a fifth driver and constructor on Sunday won the fifth grand prix of 2012.

Not only is the victory Pastor Maldonado’s first, his walk up the steps at the Circuit de Catalunya was the first taste of the podium in his two-season F1 career.

It’s also the first Venezuelan triumph in the sport’s history, and a hugely popular victory for Williams, the once-great British team headed by Sir Frank Williams, whose 70th birthday was warmly celebrated in the paddock on Saturday.

“Boy did we need that,” said Williams on BBC television.

And asked how he feels on Sky television, he smiled: “Relief.”

“Some said Maldonado was a pay driver and he didn’t deserve his place in formula one but they’ll be eating their words now,” commented former team driver David Coulthard.

“That was a fantastic drive,” added Coulthard, referring to Williams’ first win since Juan Pablo Montoya in 2004.

Williams enthused: “I didn’t see him (Maldonado) make one single mistake.”

“You can’t really fault him,” agreed Williams’ 1996 world champion Damon Hill.

Amazingly, however, away from the champagne, Sebastian Vettel’s sixth place leaves him at the top of the drivers’ championship, and he is now neck-and-neck with Fernando Alonso, who finished second on Sunday in the improving Ferrari.

Lewis Hamilton, who finished dead last on Sunday and finished eighth, is third in the points classification, ahead of Lotus’ Kimi Raikkonen.

Finn Raikkonen finished third on Sunday, and is the favourite to become F1′s sixth different winner of 2012 in Monaco in a fortnight.

“We showed we still have the speed,” the Lotus driver said after the Spanish grand prix. “If we had a few more laps, we could have fought for a victory.”