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.”

More than half of Michael Schumacher’s German compatriots think the seven time world champion will return to retirement at the end of this year.

After three years of retirement, the 43-year-old returned to F1 in 2010 on a three-year Mercedes contract, which runs out in 2012.

SID news agency commissioned the German market research company Promit to carry out a survey as to whether respondents think Schumacher will quit at the end of this year.

55.4 per cent answered yes, while only 26.2 per cent said they think Schumacher should sign on for at least another season.

The winner of a record 91 grands prix has failed to see the chequered flag in three of the five races so far this year, finishing just tenth in both Malaysia and Bahrain.

In contrast, teammate Nico Rosberg’s three top-seven finishes in 2012 included pole and victory in China, netting him 41 points compared with Schumacher’s 2 overall.

“I don’t think we can write him (Schumacher) off yet,” insisted Telegraph correspondent Tom Cary this week.

“His pace hasn’t been bad and he started the season very well. (He) was unlucky in quite a few races, his wheel fell off when he was running second in China and could have had a big haul of points.

“He is making mistakes in wheel-to-wheel racing though. But if he gets a few decent finishes or even wins a race then we could see him continue (in 2013),” added Cary.

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”.

Pirelli stands ready to supply special ‘qualifying tyres’ to formula one teams next year.

With the emphasis of the sport’s spectacle now relying on the complex and heavily degrading control tyres, it was the qualifying session that suffered last weekend in Barcelona.

Arguably to the detriment of Saturday’s spectacle, teams took an exceedingly strategic view of the fight for pole position, with some drivers sitting out the decisive ‘Q3′ runout altogether.

One solution, according to Pirelli’s chairman Marco Tronchetti Provera, is the return of ‘qualifying tyres’.

The proposal has been made following recent criticism, notably by seven time world champion Michael Schumacher, of Pirelli’s 2012 product.

Tronchetti defended his marque’s approach.

“What we have is many competitive cars, which is what the teams wanted — opprtunity for everyone who is able to win,” he told Italian radio Rai GR Parlamento.

“So it’s fine if someone complains. We are available to the teams. We are ready to make qualifying tyres tomorrow.

“But they are choices that are not ours.”

A tension has crept into F1 drivers’ relationships, as they look ahead to a fiery meeting at the Barcelona circuit on Friday.

Fernando Alonso had given the first hints about the tension when he hit out at Nico Rosberg’s aggressive tactics in Bahrain three weeks ago.

And earlier this week, the Spaniard insisted there is not enough “respect” between the drivers when they are jostling for position at grands prix.

“Fernando made it pretty clear,” world champion Sebastian Vettel told reporters on Thursday. “He said ‘you have to leave the space — all the time you have to leave the space!’”

Rosberg said he is happy if discussions about his driving take place this weekend, but also in the firing line is Lewis Hamilton, who passed the Mercedes driver on the asphalt run-off in Bahrain.

“I was surprised Lewis was allowed to keep his position,” said Mark Webber.

“I’m sure we’ll talk about it in the drivers’ briefing.”

McLaren’s Hamilton insisted he did nothing wrong, but he added: “I’m not really bothered. It’s good to have clarity.

“Mark is probably one of the most – if not the most – outspoken individuals here (in F1), so that is the least I expect from him.”

Also among the most aggressive – and regularly criticised – drivers is Michael Schumacher, and he insisted that the FIA is fully able to make judgements about incidents.

“If it’s not within the rules the FIA would have taken action,” said the seven time world champion, referring to the incidents in Bahrain. “They didn’t and I didn’t see anything wrong either.”

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.”

It was a breakthrough for Mercedes and Nico Rosberg, but the Chinese grand prix was a “difficult day” for Michael Schumacher.

That is the admission of Shanghai winner Rosberg, whose first race win after more than 100 attempts also delivered German marque Mercedes’ first works victory for more than half a century.

“I felt he was very happy for me,” Rosberg told Auto Bild Motorsport, when asked what seven time world champion Schumacher’s reaction was.

Since returning to F1 more than two years ago, 43-year-old Schumacher – although stepping up his pace in 2012 – is yet to finish a single grand prix on the podium.

Nonetheless, he offered his congratulations “very, very warmly” after China, Rosberg revealed.

“At the same time I know that it was, of course, a difficult day (for him),” he admitted.

Norbert Haug, the team’s motor sport director, recently sounded inclined to keep Rosberg and Schumacher together beyond 2012, despite the fact the older and more famous German’s contract is ending.

He insisted there is “nothing negative” about their relationship.

As for ongoing rumours that Schumacher still enjoys number one status, Haug called that idea “absolute nonsense”.

“Do you know what Nico said to me, before Michael came? He said ‘If you can get Michael (on the team), then try everything for it’.”

Rosberg has not changed his tune.

“There was never a situation in which Michael got anything before I did,” he confirmed.

Niki Lauda is sure Michael Schumacher will return to the top step of the podium this year.

As Mercedes took a step forwards with its new W03 car in 2012, it was the famous seven time world champion’s teammate Nico Rosberg who tasted success first, securing pole and victory in China last month.

But triple world champion Lauda told Germany’s Bild newspaper: “Michael Schumacher will win this year.

“Finally Mercedes are good enough to be able to attack the best.”

Schumacher, 43, has not been on the podium since he returned to F1 in 2010.

The German has also played down the team’s chances on the demanding Circuit de Catalunya this weekend, even though Mercedes is debuting a new ultra-light carbon gearbox in Barcelona.

Lauda, meanwhile, played down Schumacher’s widely-reported criticisms of this year’s Pirelli tyres, which have seen him labelled either a sore loser or a spoil-sport amid the exciting 2012 season.

“Schumi can’t spoil formula one,” laughed the Austrian legend. “He has been in the business so many years — he knows how it works.

“I see Rosberg’s success as spurring him on rather than frustrating him. He will fight through it,” predicted Lauda.

Michael Schumacher has been pipped at the post in the race to be the world’s richest sportsman.

According to the Sunday Times’ annual listings, the seven time world champion’s (US) $823 million in career earnings is beaten only by golf legend Tiger Woods.

American Woods has earned $869 million in his own ultra-successful career, the newspaper found.

And the Sunday Times said the pair have each earned hundreds of millions of dollars more than other high-earning sportsmen, including Michael Jordan ($516m), Roger Federer ($316m) and David Beckham ($258m).

F1′s two other representatives, Fernando Alonso and Kimi Raikkonen, were way down the top-twenty list, with their respective earnings at about $161 million apiece.

McLaren’s world champions Lewis Hamilton ($89m) and Jenson Button ($85m), meanwhile, appear only on the list for British sportsmen, and they are both outpaced by the $129m earned by former Ferrari driver Eddie Irvine mainly through property investment.

However, Hamilton and Button have each earned more in their careers than David Coulthard, Nigel Mansell, former BAR boss David Richards (all $80m) and Sir Jackie Stewart ($67m).

Those earnings, however, are all dwarfed by Bernie Ecclestone’s estimated $4 billion, although the 81-year-old F1 chief executive does not appear at all on the list of the world’s richest overall.

That list is headed by mega-earners like Sauber sponsor Carlos Slim, who according to the Sunday Times is worth $71 billion.

Michael Schumacher’s brother has tipped the seven time world champion to keep racing beyond his 44th birthday.

Schumacher’s Mercedes deal runs out this year, but talks about a new contract for 2013 are yet to be discussed.

Ralf Schumacher, also a grand prix winner and six years younger than his more famous sibling, was asked by Bild am Sonntag newspaper about Michael’s recent anti-Pirelli outburst.

Asked if it was an overreaction to the fact his teammate Nico Rosberg was the first Mercedes driver to win in 2012, Ralf answered: “It has nothing to do with it.

“But for sure Michael came back to celebrate successes with Mercedes. And until he succeeds, he will not give up.

“I still see a lot of fire in Michael,” said Ralf Schumacher, now a DTM driver with Mercedes.

“He is pushing hard, as we saw as recently as Mugello last week.”

Ralf said Mercedes’ 2012 F1 car, the W03, is well built.

“I think we will see Michael on the podium soon,” he insisted.

“At some point, there surely comes a point when the body can’t do it any more. But when I look at Michael, that’s still a few years away.

“I certainly won’t be racing as long as he has,” he laughed.

An obvious tension was evident at Mugello when Pirelli’s Paul Hembery was asked about Michael Schumacher.

The seven time world champion had slammed F1′s official supplier after Bahrain, arguing that the 2012 tyres degrade so quickly it makes driving a grand prix car as slow as a safety car.

“We haven’t spoken,” Briton Hembery is quoted by Germany’s Auto Motor und Sport. “I’ve just read something on the net about the tyres from his teammate Nico Rosberg which is very different.”

Asked if Schumacher’s criticism was irritating, he answered: “We built the tyres the way we were asked to.

“The FIA, Bernie Ecclestone, even the teams wanted it this way. The spokesman for the teams at the time was Ross Brawn, Schumacher’s team boss.

“There have been four different winners in the four races so far, which alone shows that we must have done something right,” Hembery insisted. “As a fan I would be thrilled.”

Asked if he can at least understand Schumacher’s frustration, he continued: “The four winners this year have not won by chance.

“They were absolutely the best drivers in those races and all of them were faster than their teammates.

“I can understand that Michael was frustrated at the last race. Among the four winners so far were two Germans, and then you had Kimi (Raikkonen), who in the fourth race of his comeback is on the podium.

“Racers are winners; they’re not happy unless they’re winning.”

Hembery denied that tyres have, in 2012, become more important than the cars or drivers.

“That’s a misconception,” he insisted. “The driver has a huge impact.

“Anyway I’m convinced that at Silverstone at the latest the teams will have the problem under control. Just as they did last year.”

Finally, he insisted that Pirelli is not going to make any knee-jerk reactions.

“If there are 23 drivers satisfied and only one dissatisfied, then I don’t think we need to change something,” Hembery is quoted by Bild newspaper.

Ferrari’s Fernando Alonso, however, acknowledged a slight frustration.

“For the top teams it’s a bit frustrating,” he told La Stampa newspaper, “when it’s difficult to exploit all your potential.

“It’s like Real Madrid, Barcelona and AC Milan suddenly playing with the budget of Cesena.”

F1′s new face of 2012 is polarising the sport.

It seems teams, drivers and spectators alike either love or hate the new great influence brought largely by Pirelli’s new generation of tyres.

An admitted critic is Michael Schumacher.

“It’s a 1000 piece puzzle that you need to put together at each race,” said the seven time world champion, according to Auto Motor und Sport.

Not for three decades have four different drivers driving for four different teams won the opening four grands prix of a season.

“From the standpoint of competition,” wrote Livio Oricchio in O Estado de S.Paulo newspaper, “there is no doubt that the Pirelli 2012 generation meets fully the objective of promoting the show.

“But if you think purely about the engineering challenge that is formula one, and the genius of the people and the immense financial and technical resources needed for success, the tyres have now taken on such an importance that the results don’t seem compatible.

“Myself, and many in formula one, hope the new versions of tyres that Pirelli is developing returns a little more predictability in terms of how they behave, without affecting the show too much.”

For now, however, the teams need to put their puzzles together, and that will undoubtedly be the focus of this week’s three-day in-season test at Mugello.

“He who understands the tyres first,” McLaren team principal Martin Whitmarsh astutely noted, “will have a huge advantage in the world championship.”

A broad understanding is already developing, including why 2012 winners Jenson Button, Fernando Alonso, Nico Rosberg and Sebastian Vettel won from the very front of the field.

“When you’re in a battle, you can’t take the lines that are best for the tyres,” said Mercedes’ Ross Brawn.

All eyes are now turning to Mugello, where the understanding will continue.

“These test days could change the balance of power in formula one,” Norbert Haug predicted dramatically in Bild newspaper.

Not everyone is enthusiastic, however, including McLaren who oppose the Mugello test on cost grounds.

Williams’ chief engineer Mark Gillan agrees: “The days of test teams are gone, so this is not logistically easy,” he is quoted by Germany’s Sport1.

Bruno Senna added: “Mugello is not an ideal test track, as it’s very different to most of the tracks that are on the calendar.”

Pirelli test driver Lucas di Grassi has defended the F1 tyre supplier following Michael Schumacher’s criticism.

Schumacher attacked the Italian marque’s 2012 product after the Bahrain grand prix, complaining that the tyres wear so fast that drivers often have to take corners at half-pace like the safety car.

“In some ways he’s right,” Brazilian di Grassi, who along with Jaime Alguersuari tests tyres for Pirelli, is quoted by Globo.

“You can’t go at 100 per cent all the time because the current tyres are designed to highlight the strategy during the races.

“Drivers have to think more about what part of the race to make best use of the tyres,” said the former Virgin driver.

Di Grassi, 27, credited Pirelli for the exciting races seen so far in 2012.

“The championship is very balanced, which is good for everyone, especially the public,” he said.

“It’s partly because Pirelli has been able to use the data it collected last year and make good decisions for this year,” added di Grassi.

Also with a view contrary to Schumacher’s is the seven time world champion’s own teammate, Nico Rosberg.

“F1 has become more interesting,” said the Shanghai winner, “as everything has been shaken up — it’s much better than the same cars and drivers always driving away from the front,” he is quoted by German media.

“Due to the tyre situation, the races have been very varied, which is an extraordinary challenge but also very exciting. And we have to get used to it,” added Rosberg.

He does not agree with the seven time world champion, but Norbert Haug insists he can understand Michael Schumacher’s criticism of the current generation of Pirelli tyre.

Mercedes driver Schumacher slammed F1′s official supplier after last Sunday’s Bahrain grand prix, saying the 2012 tyres degrade so quickly that they are not good enough for the pinnacle of motor racing.

“We drive around like the safety car. It is not a satisfying situation,” he said.

Schumacher’s boss Haug, however, does not fully agree, insisting Pirelli has contributed to a “very great competition” in 2012 featuring “very good races”.

“Of course, for a driver, there is always a certain frustration when you think you could be going faster, but you are having to be careful,” Haug told German reporters including Sport1.

“That’s just the nature of the racer,” he added.

Haug said Schumacher’s comments also prove that Mercedes does not muzzle its drivers, who may freely express their personal opinions.

All this year’s title contenders know after four ‘flyaway’ races in 2012 is that they do not know what will happen in Spain next month.

“The only certainty is uncertainty,” read the German headline at Netzeitung.

With F1 generally regarded in the wider world as a sport with predictable results, this is an entirely new situation.

“The statistics show that it’s been nine years since there have been four different winners in the first four races,” said Ferrari team boss Stefano Domenicali.

Indeed, the famous Italian team as well as McLaren, Mercedes and Red Bull have won the opening races of 2012, and also with potentially winning pace have been Lotus and Sauber.

“More than that,” continued Domenicali, “you have to go back 29 years to find the last time four different cars won.”

One explanation is that F1 has never been more competitive, with plenty of well-oiled teams and no fewer than six world champion drivers on the grid.

But Domenicali thinks Pirelli is the dominant factor.

And not everybody is happy about that. Michael Schumacher told Bild newspaper that this year’s tyres degrade so fast that rubber “flies from the rim” if he pushes too hard in a corner.

“We drive around like the safety car. It is not a satisfying situation,” the seven time world champion said.

Pirelli’s motor sport director Paul Hembery is unimpressed with the rebuke, insisting that the Italian marque is only trying to “make tyres that make the races exciting”.

“We cannot take individual drivers into consideration,” the Briton insisted.

“It would be dead easy for us to make tyres that don’t break down. Then the top ten would also be the top ten in the race.

“But no one wants to see boring processions,” Hembery claimed.

Agreed the Swiss headline at Blick: “Pirelli is sweeping away the boredom”.

Indeed, not even the other Mercedes driver, Shanghai winner Nico Rosberg, agrees with Schumacher.

“It’s total chaos. You don’t know who is going to be fast at the next track,” he is quoted by DPA agency. “Formula one has become almost unlike any other sport.

“Yes, you cannot drive any laps any more at full throttle. Often, it’s like driving on ice. But that’s a big and an interesting challenge,” said the German.

Undoubtedly exciting for the fans, but the teams are having to adapt quickly. Italy’s La Gazzetta dello Sport said on Sunday that Vettel’s victory could mean Red Bull resumes its dominant grip on F1.

Dr Helmut Marko doesn’t think so. “We don’t even know who our opponents are!” he exclaimed.