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.”

Even ahead of F1′s Singapore floatation, the sport has some new owners.

Reuters, the specialist financial market news agency, said US-based asset managers Waddell and Reed, Blackrock and Norway’s Norges Bank have bought a $1.6 billion stake from existing owners CVC.

The report cited a source “with direct knowledge of the matter”. The companies did not immediately comment.

It drops CVC’s stake from 63.4 per cent to about 40pc, the source said.

We reported on Monday that the Singapore stock exchange approved F1′s plan to raise as much as $3 billion in an initial public offering.

Other reports said pre-marketing for the listing, likely to go ahead at the end of June, will begin immediately.

“It is not our practice to publicly comment on our dealings with listing aspirants,” said a Singapore bourse spokesman.

Some insiders have expressed concern.

“Look at the muted first-day response to Facebook’s IPO,” an unnamed banker told the Singapore broadsheet Straits Times. “The F1 listing is not nearly as attractive and long-awaited as that.”

F1′s next winner could be at the wheel of a black and gold car.

“I think Kimi (Raikkonen) will be the sixth different winner in the sixth race,” said Finnish commentator and former driver Mika Salo, to the MTV3 broadcaster.

Although the results in 2012 have proved impossible to predict so far, many paddock pundits expected Lotus’ E20 to be the car to beat last weekend in Barcelona.

“The big surprise was when Kimi didn’t win,” admitted former Ferrari driver Salo, referring to Pastor Maldonado’s victory for Williams.

Also confident about Lotus’ potential is Raikkonen’s teammate, Romain Grosjean, who finished behind the 2007 world champion last weekend.

“It’s good to be a little disappointed with third and fourth,” he told the French language RMC Sport. “It shows that as a team we are convinced we can win.”

According to the reigning world champion team Red Bull’s drivers, however, there is a downside to this year’s impossible-to-predict F1 landscape.

“Maybe we will see an HRT or a Marussia on pole in Monaco,” world champion Sebastian Vettel said, unenthusiastically and half-seriously.

Mark Webber insists that what has been described as the Pirelli ‘lottery’ might not be a good thing for the sport.

“I don’t know if they (the fans) will get sick of seeing so many different winners,” the Australian told Fox Sports.

“It’s nice to have different winners but also we want rivals.”

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”.

Jaime Alguersuari has told Spanish publications he is “absolute certain” he will be on the 2013 grid.

“This is the best year of my life,” he told Mundo Deportivo, referring to 2012, the year after his young F1 career stalled when he was dropped by backer Red Bull.

“I’m only 22,” said Spaniard Alguersuari, who is now Pirelli’s main test driver and a co-commentator for British radio. “I’m in the prime of my life.

“It is increasingly clear that what happened with Toro Rosso was not a sporting decision. It was an internal decision and I don’t want to go deeper.”

He sounded confident about the future.

“It is 100 per cent that I will return in 2013. After being with Pirelli I will have very important knowledge. I knew that this transitionary step was necessary and I’m very happy,” said Alguersuari.

“If I had gone (to be test driver) with a team, with all due respect, I’d have no options now.

“I am developing a product (Pirelli) that nobody understands but that is vital for formula one — to know the tyres and to understand them. I’m in the right place,” he is quoted by La Vanguardia newspaper.

“I chose to be with Pirelli because I knew it would be the most important (element) in formula one.

“I know where I am and I know where I’ll be next year,” he insisted.

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.”

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.”

The penalty might be harsh, but the loss of Lewis Hamilton’s pole in Spain is just the latest calamitous mistake by McLaren.

That was the tone of the paddock’s reaction to the news late on Saturday that a McLaren gaffe saw the FIA send Hamilton from first to last on the Spanish grand prix grid.

The Sun newspaper called it a draconian “24-place grid penalty” imposed by the FIA after an “astonishing cock-up” by McLaren.

Hamilton was told on the radio to pull over after his pole lap due to a “technical problem”.

Sporting director Sam Michael argued ‘force majeure’, but the stewards ruled that it had been entirely McLaren’s fault that not enough fuel was put into Hamilton’s car to ensure a scrutineering fuel sample.

Writing in the Telegraph, Tom Cary said the severity of the disqualification “raised eyebrows”, but agreed that “McLaren’s mistake was horrendous”.

He said it has been “a season of errors” by the famous British team, who are yet to get Hamilton’s signature on a new contract beyond 2012.

“Hamilton must be seething,” read an article in the Daily Mail newspaper, while The Times laid out McLaren’s “catalogue of errors”.

27-year-old Hamilton’s “raw talent is being thwarted by mishap and cock-up,” said journalist Kevin Eason.

“McLaren are lovely people but how the hell do they get themselves in this position?” wrote the Mirror’s Byron Young on Twitter.

Even the non-English language media agreed.

“It was another great mistake by McLaren that could eventually cost Hamilton the championship,” wrote Livio Oricchio in O Estado de S.Paulo.

Italy’s La Stampa called McLaren’s fuel gaffe a case of “harakiri”.

Germany’s Auto Motor und Sport added: “It was error number 13 for McLaren since last year”.

While highly critical of McLaren’s own-goal, however, the feeling in the paddock is that the stewards’ penalty – although accepted by McLaren – was overly harsh.

“Back of the grid? Way, way too harsh”, said the Mirror’s Young on Twitter.

“Draconian penalty in my view,” agreed PA Sport’s Ian Parkes. “Dropping Q3 time would have sufficed.”

Sky commentator Martin Brundle added: “(I) feel they should have deleted that (Q3) laptime only which would have put him sixth”.

And excluding Hamilton from Q3 altogether would have put him 11th. Now, he will be “lucky to score a point”, Auto Motor und Sport predicted.

In the Independent, however, David Tremayne noted: “Welcome to the draconian world of F1.”

David Croft, the lead Sky commentator, said the FIA stewards had acted correctly.

“A good rule should be one that covers all eventualities with a penalty that acts as a deterrent which in this case is what happened.

“Too little fuel can’t be tolerated,” he added. “It seems harsh but had Lewis taken pole by one thousandth of a second, would it be harsh then?”

The Spanish fans – not Hamilton’s biggest supporters dating back to his spats with Fernando Alonso in 2007 – were happy.

Asked on the El Mundo website whether the penalty was fair, 76 per cent answered yes.

Former F1 driver Mika Salo believes his Finnish countryman Valtteri Bottas is being groomed by Williams for a race seat — in 2012.

When the Toto Wolff-managed Bottas, 22, was announced as the British team’s 2012 reserve, Sir Frank Williams said he would practice on 15 Friday mornings and then “most likely” be replaced with a “more experienced driver” for the rest of those race weekends.

That more experienced driver would ultimately turn out to be Bruno Senna.

So with Brazilian Senna struggling so far in 2012, Salo has revealed he senses things could be about to change.

“Bottas is incredibly respected by the team,” Salo, now a commentator for the Finnish broadcaster MTV3, said.

“When I spoke with Frank Williams, he praised Valtteri to the skies, and said that he belongs in the races.

“I asked him when and he said it wouldn’t be long.

“Yes, I read between the lines that he means this season,” added Salo.

One major spanner in the works, however, is that Senna brings crucial sponsorship to Williams.

“It is a difficult situation for Williams, where both drivers bring money,” Salo acknowledged.

“But the good thing is that Frank Williams is not a businessman first, he is an old racing driver. He thinks about nothing else but how to make his team successful.

“Although Senna is a nice guy, he is not able to drive at the level that he needs to be at.”

When asked about Salo’s theory, Bottas commented: “I have no information.”

Jaime Alguersuari has concluded he made “a mistake” to remain loyal to Red Bull late last season.

After testing Pirelli’s 2010 Renault car last week at Jerez, the Spaniard moved on to Barcelona to continue his work as a co-commentator for British radio.

However, he revealed recently that he might have been on the 2012 grid, had he not believed Red Bull executives who told him he would be at Toro Rosso this year.

“It was definitely a mistake not to negotiate with other teams,” said the Spaniard, “as I had the opportunity and declined offers,” he told Marca sports newspaper.

“I did that because I had loyalty to Red Bull.”

Asked if he has talked with anyone from Red Bull since his dismissal, the 22-year-old revealed: “The directors, no, the technical team, yes.”

It still pains him that, in explaining their decision, the Red Bull officials like Dr Helmut Marko insisted Alguersuari was not a potential winner.

“If you think that for six years they supported me then they changed their opinion overnight. One day you have a champion, the next you don’t,” he said.

Michael Schumacher has denied his widely-reported comments about Pirelli’s 2012 tyres were simply about venting “frustration”.

“What frustration?” the seven time world champion was quoted as having told German media in Barcelona.

Not once but at least twice since the Bahrain grand prix three weeks ago, the Mercedes driver has suggested F1 and Pirelli have not got the balance right with the heavily-degrading tyres seen so far this season.

Schumacher insists his intention was to start a conversation.

“I am quite happy that we have initiated a discussion about how much influence one or another part should have in formula one,” he told reporters.

Fernando Alonso agreed, pointing the finger at the media for “exaggerating” Schumacher’s view.

“I read what he said and I don’t see any big problem with that,” said the Ferrari driver.

Schumacher also sounded happy that his position triggered a meeting with Pirelli officials at the Mugello test last week.

“We had a good meeting,” revealed the German, “to talk about this subject, so I just hope we continue to go in the right direction.”

Sebastian Vettel has hit back at what he thinks was an “exaggerated” reaction to Michael Schumacher after the recent Bahrain grand prix.

Schumacher, Vettel’s countryman and friend, had heavily criticised the sport’s official supplier Pirelli, despite the Italian marque’s 2012 tyres being widely credited for the exciting grands prix seen so far this year.

“It’s been a bit exaggerated,” world champion Vettel, referring to the reaction to Schumacher’s comments, is quoted by Sport Bild.

“Ultimately, we all have the same tyres, but of course as a driver you always want more grip, whether from the tyres or from the car.

“It is in our nature to want more — more especially than the others,” he smiled.

“When I talk about this with Michael, it’s not so dramatic. He has been around for a long time and has seen a lot, also when it comes to tyres.

“I don’t think he is so easily shocked,” insisted Vettel.

* Energy drink Red Bull owner Dietrich Mateschitz made a rare visit to the sport’s action on Thursday, catching the final day of Mugello testing.

Jaime Alguersuari’s father has slammed Red Bull’s decision to axe his son.

Jaime Alguersuari snr said the decision by Dr Helmut Marko to oust the young Spaniard after a strong season and at the age of 21 was “unfair and incomprehensible”.

But “whoever killed him buried him badly,” Alguersuari snr added, referring to his son’s new full time roles as co-commentator on British radio and with Pirelli.

Alguersuari snr, who is involved with the organisation of the Renault World Series, said his son is due to test Pirelli’s 2010 Renault test car next week.

According to EFE news agency, Alguersuari snr also said his son’s career to date has been more impressive than Daniel Ricciardo and Jean-Eric Vergne, who are Toro Rosso’s new drivers.

The fact F1 has chosen the Singapore exchange for the sport’s high profile floatation does not mean the city-state’s popular floodlit street race is guaranteed.

The night event’s existing five year contract runs out this year, although a two-year notice clause in the deal means Singapore should stay on the calendar at least until 2014.

On the face of it, a new deal seemed a certainty, given it was Bernie Ecclestone himself who chose Singapore as the location for F1′s forthcoming floatation.

“Formula one is known in Singapore, and Asia is thriving. It is a simpler market and not as restrictive,” he said recently.

Talks about a new race deal “are underway”, the local Business Times reported in March, “but it is understood that one sticking point is the sanction fee.”

An unnamed banker commented: “The Singapore government wants formula one to be listed here and for that to happen, it knows the race has to remain here.

“But at the same time, it doesn’t want to pay top dollar again. So the bargaining should continue for some time.”

However, the English language newspaper now reports that F1′s floatation plans, and the expiring Singapore race contract, could be entirely unrelated.

“We are in the process of negotiating a possible renewal of the (race) agreement and the outcome will be announced once discussions are complete,” said a spokesman for race promoter Singapore GP.

Second minister for trade and industry S Iswaran insisted that the mooted floatation will not influence the outcome of the race contract negotiations.

And the Singapore tourism board’s Aw Kah Peng added: “You’ve got to see whether the deal is right in every way.

“We’re hoping everybody sees value in it and we get a so-called good deal for Singapore, in terms of whether all the numbers can work out and everybody takes home something — a kind of a win-win proposition.”

Lucas di Grassi has admitted that even his continuing role at Pirelli is not a ticket back onto the F1 grid.

“I’m in the best possible position technically, as the driver with knowledge of the tyres – almost choosing them for next season – it puts me in a very comfortable position.

“Of course I want to race again with a team and I’m working on it,” said the 2010 Virgin driver, who was replaced by the now Marussia team with Jerome d’Ambrosio at the end of his only season in F1.

“The only problem is the lack of sponsorship,” di Grassi is quoted by Globo. “Let’s hope some Brazilian companies want to come in to support.”

Martin Brundle, a former F1 veteran whose son Alex now competes in the lower-tier GP3 series, admitted sponsorship is a problem for aspiring racers.

“Drivers are paying as much as $10 million to be a reserve at some teams,” the British commentator told the Daily Mail.

“Nine men who raced in F1 last year don’t have a drive any more. As soon as the money runs out, they’re replaced by someone who does have money.”