Kimi Raikkonen's manager on Monday confirmed reports the 2007 world champion is no longer in the race to move to Red Bull in 2014.
Earlier, amid reports Daniel Ricciardo has been signed to replace the Le Mans-bound Mark Webber, Red Bull's Dr Helmut Marko insisted he is "not nervous" Ferrari seems to have won the race for Raikkonen's services next year.
"I'm not nervous," the Austrian told Bild newspaper. "Don't forget that we still have Vettel."
Speaking to Finnish newspaper Turun Sanomat on Monday, Raikkonen's manager Steve Robertson admitted the current Lotus driver is not moving to Red Bull.
"The negotiations with Red Bull were not successful and ended some time ago," he is quoted as saying.
Robertson did not mention whether Raikkonen would stay at Lotus in 2014 or return to Ferrari, but he admitted it is 99.9 per cent sure the 33-year-old will still be on the grid next year.
Red Bull 'not nervous' despite not signing Raikkonen
Dr Helmut Marko has confirmed that Kimi Raikkonen is not in Red Bull's plans for 2014.
The Austrian's comments come amid reports the 2007 world champion has actually decided to move from Lotus to Ferrari next year.
After German media reports said Daniel Ricciardo will be Sebastian Vettel's new teammate, Red Bull's Marko admitted that the team's 2014 lineup will be announced this weekend in Belgium.
But he has hinted that Finn Raikkonen is now out of the running.
It is a clear sign that Red Bull has decided instead to sign Toro Rosso driver Ricciardo, who was described by Bild as a 'no-name' driver.
But Marko insisted: "This (Ricciardo's signing) is not fixed yet."
And, when asked about reports Toro Rosso is set to lose Ricciardo, team boss Franz Tost told Speed Week: "I don't know."
Rosberg happier with Hamilton as teammate - Brawn
Nico Rosberg is very happy to be tested alongside the undoubted talents of Lewis Hamilton at Mercedes, team boss Ross Brawn insists.
Paired with the great seven time world champion Michael Schumacher between 2010 and 2012, German Rosberg emerged as the most consistently strong.
But team boss Brawn admitted that Rosberg is arguably happier now, alongside Hamilton -- widely regarded as among the very best on the grid.
"Lewis is a great reference for the team," Brawn is quoted by Brazil's Totalrace.
"I think sometimes he (Rosberg) was a little unhappy with Michael, because it wasn't the same reference. Michael often had difficult moments with Nico.
"Was it because Michael was not as good as he once was? Or was Nico better than some people gave him credit?
"I think everyone recognises now that Nico was better than everyone thought," he added.
Brawn said the results of the 2013 season, with Rosberg winning twice and Hamilton opening his victory account recently in Hungary, has proved the current driver pairing is right.
"I feel vindicated now that Lewis is on the team, because people are saying how good Nico is, and I've always said so," he insisted.
Sauber still yet to pay impatient Ferrari - report
Reports that Sauber's Russian rescue deal is on the brink of collapse are persisting.
Last week, despite F1's August slumber, the Swiss team was forced to reject reports the millions in crucial backing might never materialise.
"We are astounded at the heedlessness with which some media are prepared to spread false reports and rumours," said the team in an official statement.
In the same statement, the Hinwil based team said a contract with teenage Russian driver Sergey Sirotkin, whose father is a key figure in the entire deal, "is in place".
But the German newspaper Welt am Sonntag reported on Sunday that it has "documents that prove the opposite".
Indeed, Sirotkin's father Oleg has told Izvestia, a Russian daily, that he will only travel to Switzerland this week to sign the deal.
"I guess it is not so different from other, similar (pay-driver) contracts, which are usually (EUR) 20 to 30 million," he is quoted as saying.
Welt am Sonntag correspondent Burkhard Nuppeney reported, therefore, that Sauber's short-term survival depends on the actual signing of those sponsor deals.
Engine supplier Ferrari is reportedly demanding about half of a long overdue EUR 18 million bill be paid immediately.
"Welt am Sonntag has learned that only three of the required eight million has actually been paid," wrote Nuppeney, who said the situation could come to a head this weekend in Belgium.
Teams should stay out of 2014 F1 tyre question - Lauda
F1 teams should accept the chosen specification of next year's Pirelli tyres.
That is the claim of Niki Lauda, who was speaking to Germany's Auto Motor und Sport amid reports the 2014 tyres might be slightly bigger and wider next year to suit the higher torque of the new V6 engines.
It had emerged that while Renault and Ferrari want the 2014 specification to remain the same as in 2013, F1's other engine supplier Mercedes - rumoured to have a power advantage next year - wants the bigger tyres.
"It's a very important question," Mercedes chairman Lauda said.
The very latest reports suggest that the FIA has actually decided to keep next year's tyre specification largely the same as in 2013.
But Lauda had added: "Charlie Whiting wrote to all the teams that Pirelli wants a larger diameter and wider tyres.
"The way I understand it, it is now decided by the FIA alone."
He said the teams and suppliers' only role should be to give Pirelli all the data the official tyre supplier requests.
"If not, we should not be surprised if we stand in Melbourne next year complaining again about the tyres.
"Pirelli should determine what next year's tyres look like without the influence of the teams. With the new cars and engines, it is important that we have stable tyres."