The key backer of the scheduled 2012 US grand prix insists he remains committed to the Circuit of the Americas project.

Construction in Austin, Texas, has continued amid raging local media speculation, as lawsuits are pending and questions are constantly asked about the viability of the project commenced by the now offside promoter Tavo Hellmund.

With 84-year-old billionaire Red McCombs now reportedly in the driving seat, he insisted it is “without question” he will continue to push the project forwards.

“Never has been any question,” McCombs is quoted by mysanantonio.com, after the authoritative Austin American Statesman newspaper had suggested he was on the verge of pulling out.

“I’m there for the full ticket,” McCombs insisted, although he admitted the row with Hellmund is proving a speed-bump.

“I will say we do expect to have some resolution to those issues in a timely fashion, but in dealing with the courts, I don’t know what a timely fashion is.”

He told reporters the circuit is now 60 per cent complete ahead of the inaugural November 18 race date.

Paul di Resta has hinted he would leap at the chance to replace Michael Schumacher at Mercedes.

The German marque’s Brackley based chief executive Nick Fry this week earmarked impressive Force India driver di Resta, earlier a Mercedes protege, as an ideal successor should Schumacher not stay beyond his 2012 contract.

Asked about Fry’s comments and the media speculation on Wednesday, di Resta said in Monaco: “It’s always nice to have the press interest and people looking out for you, but I need to stay focused on doing the best job I possibly can.”

He told Sky Sports News: “It’s no secret that I want to be a race winner and world champion — and to do that, I need to be in a great car.”

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.”

Felipe Massa has played down reports he is at risk of losing his Ferrari seat soon, insisting he feels fully supported by Ferrari.

The Brazilian has struggled at the wheel of Ferrari’s difficult 2012 car so far, scoring just 2 points compared with his teammate and joint championship leader Fernando Alonso’s 61.

It has triggered speculation the Maranello based team might replace him, also because Ferrari said after Barcelona it is “expecting” Massa to improve “right away”.

Whilst working at Maranello in the driver simulator on Friday, however, Massa insisted he has not been far away from Alonso at recent races.

“I think we must also take into account that, at the moment, Fernando’s driving is amazing: he is on super form, maybe even perfect,” he is quoted as saying in a Ferrari statement.

Asked if he feels the famous Italian team’s support, he added: “Absolutely, yes, I feel the whole team stands by me.

“Obviously, they are not happy with the results and neither am I: we all want to get out of this (situation) and return to normal.

“It’s possible and for sure it’s what I want and I know that with the team’s help we will manage it,” said Massa.

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.”

A lack of official information has triggered speculation about Ross Brawn’s health.

And another rumour is that his absence in Barcelona could be connected with Mercedes’ billion-dollar dispute with Bernie Ecclestone over the next Concorde Agreement.

The German squad announced on Thursday that Bob Bell is leading the team in Barcelona because regular boss Brawn is back in Britain on doctor’s orders.

Bild newspaper said the 57-year-old was given the advice in hospital earlier this week, following a dizzy spell at his home in England.

“It’s more than the flu,” chief executive Nick Fry is quoted as saying, “but I can assure you that it’s nothing life threatening.”

Indeed, a spokeswoman told us on Thursday that Brawn will be back to work at Monaco in a fortnight.

For Spain, Brawn will watch the action on television.

“We will still keep in touch,” Michael Schumacher revealed. “Ross cannot be replaced. That’s simply impossible.”

Paul di Resta has played down media speculation linking him with a high-profile switch to Ferrari.

The reports suggested the famous Italian marque has been impressed with the Scot’s one and a half seasons with Force India and sees him as a potential replacement for the struggling Felipe Massa.

“I have not heard anything about it,” the 26-year-old, who is managed by Anthony Hamilton, said in Barcelona.

“I am just concentrating on the job I have to do for Force India. That is my only focus,” he is quoted by the Scottish Sun newspaper.

However, di Resta is widely regarded as having outshone his highly-rated teammate Nico Hulkenberg so far in 2012.

But he denies he is the number one driver.

“(There is) equal opportunity and everybody seizing his chances,” di Resta told F1′s official website.

As for his dominant position over Hulkenberg, he insisted: “That would be for Nico to answer.”

Hulkenberg said on Thursday: “The first four races have been quite tough but I’m looking forward — I’m bedding in well with the team.”

F1 needs to resolve its dispute with Mercedes before the sport’s multi-billion dollar floatation plans can go ahead.

That is the warning of the German team’s chief executive Nick Fry, as Mercedes refuses to sign up to the new Concorde Agreement because rival top teams Ferrari, McLaren and Red Bull have been offered better deals.

Fry is quoted by The Times newspaper as admitting that the progress of talks with Bernie Ecclestone are “not as strong as I would like”.

But he warned: “If CVC wish to float F1, I think they need this resolved fairly quickly — possibly more than we need it resolved.”

At the same time, he played down speculation Mercedes is on the verge of quitting F1.

“The mindset is absolutely in capital letters: Mercedes-Benz wishes to be in F1,” Fry insisted. “I would add that F1 also needs Mercedes-Benz.

“I am completely convinced in my mind that if CVC wish to sell some or all of F1, the value they can derive from that would be severely diminished if Mercedes was not a participant.”

But a senior executive of Mercedes denied the spat is about money.

“It is about fairness,” the unnamed official told The Times’ Kevin Eason.

“We are facing a situation in which three teams will between them decide some of the biggest issues in formula one. That cannot be right.”

Paul di Resta has emerged as the latest candidate to possibly succeed struggling Felipe Massa at Ferrari.

Britain’s Mirror newspaper said the famous Maranello based team has “made enquiries” about the 26-year-old Scot’s current contract with Force India.

The speculation follows Red Bull’s closing down of rumours linking Mark Webber with the switch, as Christian Horner and Dietrich Mateschitz suggested the Australian is set to continue beyond his 2012 contract.

Ferrari chiefs “are known to be impressed” with di Resta since he moved as the reigning DTM champion to formula one at the end of 2010, the Mirror’s F1 correspondent Byrton Young wrote.

“Paul di Resta would be a very good target for Ferrari because (Fernando) Alonso probably has the best toolkit of knowledge and physically is one the best drivers in the world,” triple world champion Sir Jackie Stewart is quoted by the Daily Mail.

“Alonso is almost at his peak and to have a young driver such as di Resta be an understudy to Alonso is something I’d consider if I was at Ferrari,” he added.

Mark Webber appears headed for a new contract with Red Bull, after receiving a clear vote of confidence from the energy drink company’s chief.

Following speculation the 35-year-old Australian could be headed to Ferrari in 2013, Red Bull team boss Christian Horner insisted Webber “is happy to be here, and we are happy to have him with us”.

And the Swiss newspaper Blick has revealed that team owner Dietrich Mateschitz, the billionaire mogul, is also happy with Webber.

“I hope that he keeps driving with us for a long time,” the 68-year-old is quoted as saying.

Red Bull’s team boss has moved to ease speculation Mark Webber could be set to change teams at the end of 2012.

The 35-year-old Australian is now on only a one-year contract, triggering reports he has been lined up by Ferrari as a potential successor to the struggling Felipe Massa.

But subsequent speculation said Red Bull is in fact close to offering to extend Webber’s deal.

Team boss Christian Horner ridiculed the Ferrari rumours.

“I think it’s inevitable,” he is quoted by France’s L’Equipe. “Almost every driver in the paddock is supposed to be joining Fernando Alonso next season.

“We’re staying focused on ourselves. Mark is happy to be here, and we are happy to have him with us,” said Horner.

“When the time comes later this year, we will sit down and discuss the future with him, as we have done in previous seasons.

“Speculation like this is part of the business,” he insisted.

“Mark has driven very well in these first few races, finishing fourth four times. Of course we would like to see him on the podium but he has scored some very important points.

“He can do great things this year. I think with Sebastian (Vettel), they push each other — it’s also thanks to him (Webber) that Sebastian gives the very best of himself.

“There is a good dynamic between them and that’s exactly what we want,” Horner said.

F1 figures have mixed feelings after this week’s Mugello test.

Amid speculation the Ferrari owned circuit would like a spot on the race calendar, it emerged that the famous Maranello based team pushed hard for the Tuscan facility to host the first in-season test in many years.

“It’s very beautiful and the food is very good,” said Red Bull team boss Christian Horner, “but we are spending a lot of money and honestly we didn’t feel the need to come here.”

Indeed, the only circuits comparable to high speed Mugello on the F1 calendar are Monza, Spa and parts of Silverstone.

And testing at Barcelona prior to next weekend’s Spanish grand prix would have made infinitely more logistical sense.

Lotus team boss Eric Boullier said Mugello was “money spent needlessly”.

Of course, those in the Ferrari camp thought differently.

“I would do more tests during the season,” said Fernando Alonso. “One lap here is worth 100 at other places, without considering that one day here is worth a year’s work on the simulator”.

But Mark Webber said Mugello is too fast for a decent test circuit, but he was among those who enjoyed the layout.

And the Australian couldn’t understand McLaren’s opposition, which extended to both Lewis Hamilton and Jenson Button giving up their running to test drivers.

“It was an absolute no-brainer for (Sebastian Vettel and I) to be here,” said the Red Bull driver.

“Mileage is so limited these days that it’s good for me to be in the car. Any chance we get to drive the car in the real world, we’ll do it,” added Webber.

Mark Webber might have signed a pre-contractual agreement with Ferrari, one of Spain’s leading F1 correspondents has revealed.

Raymond Blancafort, writing for El Mundo Deportivo, referred to widespread speculation in the paddock about Sergio Perez’s likely future alongside Fernando Alonso.

“There may be a pre-contract,” he said, “but between Ferrari and Webber.”

Australian Webber was also linked with Ferrari last year, before Red Bull decided to sign him up for another single season.

The 35-year-old was overshadowed by his teammate Sebastian Vettel last year, but he has begun the 2012 season more strongly.

And Webber warned before the 2012 season began that if Red Bull didn’t re-sign him for 2013, “I’d need something (else) competitive (to drive)”.

“Being at the front, is certainly a big, big factor of me staying very hungry and motivated.”

Ferrari may be looking to replace Alonso’s current teammate, the struggling team veteran Felipe Massa, for 2013.

“They (Ferrari) would be able to take advantage of his (Webber’s) experience, the consistency of his results and the fact that he gets along with Alonso.

“Interestingly, Webber is also still involved with Flavio Briatore”, as is Alonso, Blancafort noted.

Ferrari will not run all of its planned car improvements at the Mugello test this week.

“My information is that the new single seater is not ready,” reported Livio Oricchio, the correspondent for O Estado de S.Paulo newspaper.

There has been speculation that, following Ferrari’s troubled start to the new championship with its F2012 car, the changes for the forthcoming Barcelona race will be so sweeping that it might be called a “B” version.

But technical director Pat Fry reportedly told Oricchio that Ferrari designers are “staying with the (current) front suspension”; a reference to the Maranello based team’s innovative use of pullrod technology this year.

And the well-informed journalist Dimitris Papadopoulos adds that, even though the Mugello-spec Ferrari will have a new nose, sidepods and wings, “there will be no new chassis”.

Rumours that a top English premier league football club is entering formula one as a sponsor have proved correct.

Ever since Sauber has been running teaser ‘Out of the blue’ and ‘True blue’ graphics on its engine cover livery in China and Bahrain, speculation about the identity of the forthcoming sponsor have been swirling in the F1 paddock.

We reported the rumour that the deal could be with the Russian billionaire Roman Abramovich, to promote his football club Chelsea.

Swiss F1 team Sauber confirmed the “new and innovative partnership” on Monday.

“The C31 sporting the blue logo of Chelsea FC will be seen for the first time at the Spanish grand prix,” the Hinwil based team announced in a media statement.

“A partnership like this between formula one and football has never existed before in this form, yet there are numerous commonalities and possible synergies,” said Sauber chief executive Monisha Kaltenborn.

The statement said Chelsea will in turn display Sauber’s logo on its advertising boards and interview walls, ensuring one another “a significant market presence outside their original sport”.