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.

Money could be at the heart of the delay in Lewis Hamilton’s re-signing with the McLaren team.

Until now, the British team has indicated it wants the 2008 world champion to stay on board, while 27-year-old Hamilton insists he has no plans to leave and will turn his attention to the 2013 contract soon.

But according to Blick newspaper, McLaren is pushing to cut Hamilton’s existing contract retainer “in half” to “about EUR 10 million”.

The Swiss report said the driver is unimpressed with the negotiations so far, but at least Hamilton’s mood has improved tenfold compared with his calamitous 2011.

It is a full year since Hamilton raged about his “frickin ridiculous” track rivals in the 2011 Monaco grand prix, when he also half-seriously suggested that the stewards were targeting him “because I’m black”.

He is back on top form this season, but still yet to win a race, arguably mainly due to McLaren’s numerous team mistakes.

Reports have suggested boss Martin Whitmarsh, who insists Hamilton “deserves” to win this weekend in Monaco, is worried the mistakes might drive the highly rated racer away.

On Wednesday, however, Hamilton denied he is frustrated.

“I’m not, no. This is the way racing goes sometimes,” he insisted.

“I could easily get frustrated because I could have a healthy lead in the championship — but that’s not the case.

“I don’t want to speak too early but something has definitely changed. Whatever I’m doing is working,” he told British reporters.

“In life, things just seem a lot better and that’s enabling me to get on with my job without having any baggage.”

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.

Formula one is worth about $8 or $9 billion, as the sport’s owner CVC confirmed it has this week sold a 21 per cent stake to new investors.

News of the sale coincided with the launch of pre-marketing ahead of one of the biggest ever sports floatations, data by the financial experts Thomson Reuters shows.

“It’s cheap compared to Facebook,” chief executive Bernie Ecclestone told reporters on Tuesday, confirming that the Singapore IPO looks set to go ahead soon “with no dramas”.

“All the things that have to happen have happened. It will be finished by the end of June,” the 81-year-old is quoted by the Telegraph.

F1′s new one-fifth owners are US managers Waddell and Reed, the powerful Blackrock and Norway’s central bank Norges.

“It’s a great way to start the IPO and lets investors know what they can expect,” said Ecclestone.

The diminutive Briton said he is keeping his 5.3 per cent stake, and staying in charge. His former wife Slavica controls another 8.5pc, the news agency Bloomberg said.

“You might as well have asked Frank Sinatra who he would appoint to replace him,” Ecclestone insisted.

CVC said in a statement that is remains F1′s biggest and controlling shareholder.

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.”

Fernando Alonso has denied Ferrari is on the verge of giving up on the 2012 championship.

The Maranello based team has brought significant updates to its so far disappointing F2012 car for this weekend’s Spanish grand prix.

Imagining the single seater doesn’t make a major step forward in Barcelona, Alonso was asked whether Ferrari might start turning its focus to an all-new project for 2013.

“We’ll see, we’ll see after the race, because we don’t know what car we have (yet),” the Spaniard told reporters on Thursday. “I answer you on Sunday.”

Alonso said more updates for the F2012 are also scheduled for the forthcoming Monaco and Canadian grands prix.

But what if the Barcelona changes leave Ferrari with a midfield car? Would the time be right to get an early jump on the 2013 project?

“I don’t think so,” answered Alonso. “If the step is not good enough … we need to work harder, for Monaco and for Canada, and bring more new parts in a more aggressive approach.

“The championship is long and we will never give up in May,” he insisted.

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.”

Kimi Raikkonen is not ruling out victory in Barcelona this weekend.

If he does succeed on Sunday, the Finn will become the fifth different driver, driving for a fifth different team, to win the fifth grand prix of 2012 — an almost unthinkable scenario for formula one.

Not only that, some believe that – despite McLaren, Ferrari, Mercedes and Red Bull having fielded the winning cars so far in 2012 – Lotus is actually the favourite in Barcelona.

Raikkonen and his teammate Romain Grosjean were both on the podium in Bahrain, and the black and gold E20 set the pace last week at the Mugello test.

“You would say now that the Lotus and the Red Bull are the cars to beat,” said Melbourne winner Jenson Button on Thursday.

Raikkonen, openly disappointed about his second place recently, hopes so.

“If everything goes smoothly then we can be up there,” he told reporters on Thursday.

He agrees that the car was a true pacesetter in Bahrain and Mugello.

“Let’s hope it works just as well if not better here,” Raikkonen, 32, told the Finnish broadcaster MTV3 at the Circuit de Catalunya.

“Then we will at least have the possibility of victory,” he added.

He does not, however, want to talk about the championship.

“It has happened before that I had the best car overall but was still not the champion,” said Raikkonen. “There are so many little things that have to go in the right direction for you (to win the title).

“It’s pointless to think about the championship. Let’s try to do our job well, and see if that’s enough,” the self-described ‘iceman’ added.

Narain Karthikeyan is not guaranteed his HRT seat for the whole of the 2012 season.

Following what the reporter referred to as a ‘chat’ with the Indian driver, the Times of India claimed Karthikeyan is “a million euros” short of a contract that will see him definitely race through November’s Brazil finale.

The 35-year-old also began the 2011 season for the struggling Spanish team, but was replaced by the Red Bull-funded Daniel Ricciardo mid-season.

The Times of India said securing the extra million in sponsorship is proving “difficult” for Karthikeyan.

“Sponsors are happy to give him money but not to the team, as obviously they do not want to be associated with a struggling outfit,” the report said.

The good news for Karthikeyan, according to the journalist Harish Samtani, is that his sponsorship deal with Tata brings to HRT the Williams gearbox, valued at about EUR 5 million.

The report said the link between Karthikeyan and Williams is the British team’s joint venture with Jaguar, which is owned by the driver’s sponsor Tata.

McLaren has made changes to its pit crew and processes, following recurring problems at recent grands prix.

Team boss Martin Whitmarsh launched a full internal investigation after Bahrain, where problems with the fitting of wheels during crucial stops resurfaced.

“We have to try and make sure we pick up on them (the problems) for the next race because we can’t afford to lose points like we did,” said Lewis Hamilton.

One wheel-gun operator got the lion’s share of the blame, but Whitmarsh insisted that McLaren would also “look at the equipment, the process, the approach”.

He told reporters on Wednesday: “We have looked at what we are doing and have made some changes to the team and the process and we’ll see them on Sunday in Barcelona.”

Despite the heat felt by the deposed wheel-gun operator, Whitmarsh reveals he was “astounded” by the number of McLaren mechanics who put their hands up to replace him.

“It reflects well on the spirit of the team. There’s been a reasonable amount of practice and we’ll see at the weekend. I believe we’ll have good stops,” he concluded.

Mark Webber has denied signing with the Ferrari team for 2013.

Spanish media reports, indicating that a letter of intent may already have been written, said Fernando Alonso favours Australian Webber to replace the struggling Felipe Massa.

The reports also said Webber, 35 and with an expiring Red Bull contract, could be signed for a single season ahead of Sergio Perez joining in 2014.

“Sergio was flavour of the month last week for the Ferrari drive; now it’s me,” Webber said at the Mugello test on Tuesday.

“I’m focusing 100 per cent on this season and doing the best job for myself and Red Bull Racing. I’m not putting any energy into anything else.”

Italian-language reporters also quote Webber as saying: “There’s a whole season ahead of us before we need to think about the future.

“One day the talk is about Jenson (Button joining Ferrari), then it’s Sergio, now it’s me. I haven’t signed anything.”

“My focus is on this team (Red Bull); we’ve had a good start to the season, we’re only four races down and the road is very, very, very long before we start talking about the future.”

As for the closely-contested 2012 championship, Webber added: “The grid is very close together.

“Sebastian (Vettel) had a weekend without problems in Bahrain and won but he didn’t dominate, and that’s the same for everyone.

“No one will be dominant in the first half of the season, so to be third at the start of the European season is not bad,” he said.

Kimi Raikkonen insists he is “not interested” in formula one — except the cars, and winning.

Asked by the reporter for Bild am Sonntag newspaper if the famous Finnish character might remove his sunglasses for an interview, 2007 world champion Raikkonen replied simply: “No.”

At the end of his fourth race since returning to F1 from rallying, the 32-year-old was back on the podium in Bahrain.

“It’s not going too bad,” he said. “I like what I’m doing, that’s enough. I don’t care if someone says whether I’m doing it well or not.

“Still, it’s disappointing when you’re only second. Who knows what’s going to happen at the next race,” the Lotus driver added.

Just after leaving F1 at the end of 2009, Raikkonen said he disliked everything about the sport — except the cars.

Nothing has changed.

“No. I’m only here for racing,” said Raikkonen.

“All the other bulls**t I can do without. If you took away the cars from formula one, I would not be there.

“Formula one plays no role in my personal life. I have a real life! I think for many people, their life is formula one. For me it’s not.”

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.

Tyres. The political dramas aside, that word utterly dominated the Bahrain grand prix weekend.

Afterwards, Michael Schumacher admitted he was “unhappy” with the situation.

“Sometimes we are driving only 60, 70 per cent through the corners,” he is quoted by Bild newspaper.

Pirelli did not take the criticism lightly, insisting it has made Canada 2010-style, heavily degrading tyres to order, for the benefit of the ‘show’.

Motor sport director Paul Hembery on Monday ‘re-Tweeted’ a message from a follower accusing the seven time world champion of having thrown “his toys out of the pram”.

Moreover, Pirelli said Bahrain is perhaps “the most demanding” on the entire calendar when it comes to degradation.

“As a result, knowing how to manage the tyres and contain thermal degradation was a vital skill” on Sunday, the Italian marque said in a statement.

On Twitter, The Times’ correspondent Kevin Eason called Bahrain an “excellent race, although I am not sure we haven’t moved from tyre management to lottery”.

The roulette wheel didn’t spin up for McLaren – the team with arguably the best overall car so far in 2012 – on Sunday.

“Nobody has added a second to their cars in just a week after China,” lamented Jenson Button, “but here we were a second off the pace.”

His boss Martin Whitmarsh told Auto Motor und Sport: “Maybe it was the pressures, maybe the temperatures. We really don’t know.”

The German reporter said Whitmarsh’s comment indicates an “uncomfortable realisation” for such a scientifically meticulous team.

Whitmarsh agreed: “It is now more important to understand the tyres than to find a bit more downforce.”

The tyre marque’s test driver Jaime Alguersuari told Mundo Deportivo newspaper that Pirelli deserves credit, not criticism.

“Pirelli is largely responsible for making F1 the most spectacular it has been in a decade,” said the young Spaniard.

The calamitous Bahrain grand prix saga has not jeopardised the island Kingdom’s future on the F1 calendar.

That is the strident claim of Bernie Ecclestone, after the F1 chief executive and FIA president Jean Todt displayed rare unity as they insisted the country’s civil and political problems would not affect the grand prix.

But amid the bubbling Bahrain saga, Ecclestone had suggested that Bahrain might face trouble when it comes to negotiating a new contract, with the existing agreement only set to extend for three more years.

However, when asked by Reuters if F1 is going to keep returning to Bahrain despite this year’s troubles, Ecclestone insisted on Sunday before leaving the Persian Gulf: “Absolutely. Forever. No problem.”

Like Todt, he even played down the damage done to F1′s reputation this weekend.

“I think it’s good because people talk about things, you know. You know what they say — there is no such thing as bad publicity,” said Ecclestone.

In truth, reputation damage has undoubtedly been done. But Roger Benoit, the veteran correspondent for the Swiss newspaper Blick, admitted he is dismayed with how politics interfered with sport so strikingly this weekend.

“On all continents, somewhere, all hell is breaking loose. And as a formula one reporter, you’re flying around this globe two or three times a year,” he wrote.

“We go to countries that are politically explosive. Where human rights are violated, where poverty reigns.

“But we hardly talk about it — not in China, India, Korea, Malaysia, Singapore or Brazil. In 2014, we’re going to Russia.

“Years ago, our circus happily danced around in apartheid South Africa, and the military dictatorship of Argentina.

“Formula one is pure entertainment. Detached from the problems of the world. But here, in Bahrain, every reporter entered the political field, whether he liked to or not,” wrote Benoit.

So that is why Ecclestone is unapologetic, after championing the Bahrain grand prix.

“Because, basically, the problems they have in Bahrain have nothing to do with F1,” the 81-year-old told El Pais newspaper.

“The relevant agencies gave the nod as far as security was concerned, and I think it is clear that they were not wrong.”

He also sees no problem with F1 being used as a political tool.

“Governments want to have an F1 race for the same reason as they want the Olympics. We come to agreements with the promoters and, if that’s good for the country, fine,” said Ecclestone.