"For now, there is no proof (gas was used). This is based solely on their personal conviction as they had stomach aches when they woke up," he said.
Jenson Button says he has no plans to race again in Formula One after Sunday's season-ending Abu Dhabi Grand Prix, even though McLaren are keeping the door open for a possible return in 2018. "I go into this weekend thinking it is going to be my last race. I think that is the best way to be," the 2009 world champion told reporters on Thursday. "At this moment in time I do not want to be racing in Formula One past this race. I think of this as my last race and hopefully everybody else does as well."
Ferrari's Sebastian Vettel was fastest in Formula One's pre-season testing at a chilly Circuit de Catalunya on Tuesday while Mercedes rival Lewis Hamilton took one for the team and "sacrificed" his scheduled stint.
The pole was Hamilton's ninth in 10 races this season, the 47th of his career and left the Briton perfectly placed for a fifth career win at the Hungaroring.
Brazilian Felipe Massa announced on Tuesday he is leaving Ferrari at the end of the season, opening the door for Kimi Raikkonen to return to the Formula One team that took him to the title in 2007.
Hamilton held off a mid-race challenge from Red Bull's Max Verstappen to register a record-equalling fourth triumph at the floodlit Marina Bay Street Circuit track, while Vettel finished third to slip further behind in the title race.
Lewis Hamilton won the inaugural Russian Formula One Grand Prix and extended his championship lead on Sunday in a Mercedes one-two that clinched the team's first constructors' title.
Sebastian Vettel's expletive-laden radio rants betray his frustration at Ferrari's fading form, according to his former Red Bull team mate Daniel Ricciardo and predecessor Fernando Alonso.
Lewis Hamilton of Mercedes stormed to pole position with a scorching lap in qualifying for the Malaysian Grand Prix as title rival Sebastian Vettel was left stranded in the garage and will start dead last.
Indonesian rookie Rio Haryanto's Formula One debut turned sour on Saturday when he was punished for a pit-lane crash during the final practice at the Australian Grand Prix and condemned to start the race from back of the grid.
A summary of sports events and sports persons, who made news on Wednesday.
Ferrari made a strong start to the first day of Formula One testing, on Monday, with four-times world champion Sebastian Vettel top of the timesheets at lunchtime with 72 laps completed.
Team mate Sebastian Vettel was second fastest to complete the front-row sweep, with championship leader Lewis Hamilton third for Mercedes.
Ferrari felt the pain on Sunday after emerging with just two points from a hard day in front of their home fans at the Italian Grand Prix.
Jules Bianchi had a bright future in Formula One.
German Nico Rosberg eased to victory in a chaotic Belgian Formula One Grand Prix on Sunday.
Formula One world champion Lewis Hamilton won the Hungarian Grand Prix from pole position for Mercedes on Sunday to go into the August break with a 24-point lead over Ferrari rival Sebastian Vettel.
Hamilton, Bottas's team mate, started in eighth place after a grid penalty triggered by an unscheduled gearbox change and finished fourth.
Silverstone can provide the antidote to Austria for Lewis Hamilton this weekend, with a record sixth British Grand Prix win -- and his fifth in a row -- there for the taking.
Lewis Hamilton believes his Mercedes Formula One team can live up to their advance billing as favourites when the season starts in Australia next week.
Ferrari were top in three of the four days in Jerez and second fastest on both days in Barcelona.
Summary of sports events and persons who made news on Monday
Media reports suggested the McLaren driver, whose wife is Japanese, was likely to announce at this weekend's Japanese Grand Prix that he would be leaving Formula One at the end of the year.
The win also set a record, one that Hamilton had previously shared with seven times champion Michael Schumacher, of 41 wins from pole position.
For Mercedes to be denied in Brazil, Ferrari will have to score 13 points more than Mercedes -- a feat they have managed only twice in 19 races so far this year.
Newly-crowned four-times world champion Sebastian Vettel showed no signs of easing up as he led a Red Bull one-two in free practice for the Abu Dhabi Formula One Grand Prix.
F1 CEO and chairman Chase Carey reiterated that Asia is a "tremendously" important region for the sport and India figures in their scheme of things for the future, if not now, with the calendar already packed till next year.
Germany's Nico Rosberg put Mercedes on pole position for the US Formula One Grand Prix on Saturday with championship leading team mate Lewis Hamilton qualifying second. Mercedes-powered Williams filled the second row with Finland's Valtteri Bottas third fastest and Brazilian Felipe Massa fourth.
India has no Formula One driver and there will be no Grand Prix here next year but Force India co-owner Vijay Mallya believes he has unearthed the country's next driving talent in a Mumbai teenager.
Red Bull's Sebastian Vettel completed a practice hat-trick on Saturday with the fastest time in a smog-shortened final session before qualifying for a race expected to bring him a fourth successive Formula One title.
Formula One's governing body is planning to tighten the rules on telemetry next season to limit the amount of remote assistance drivers can get from their data engineers.
History suggests that when drivers are fighting for race wins and championships, and enjoy equal status in the same competitive cars, then real friendship is often the first casualty.
Red Bull's Mark Webber faces a 10-place grid penalty at the Korean Grand Prix after being reprimanded for hitching a lift on Fernando Alonso's Ferrari at the end of Sunday's race in Singapore.
The Briton, who started his career working for the Hesketh team in 1977, died in Melbourne of a pulmonary embolism, it said.
Australian Daniel Ricciardo won the Chinese Grand Prix for Red Bull on Sunday while Ferrari's championship leader Sebastian Vettel finished only eighth.
World champion Lewis Hamilton topped the timesheets for Mercedes in both practice sessions of the Australian Grand Prix on Friday but team mate Nico Rosberg crashed as waterlogged conditions put a dampener on Formula One's season opener.
Four-times world champion Sebastian Vettel won the Australian Grand Prix for Ferrari on Sunday to dash Mercedes' hopes of extending their dominance into a fourth successive season of Formula One.
Three-time world champion Lewis Hamilton dominated practice at the season-opening Australian Grand Prix on Friday, putting Mercedes on top of the timesheets and leaving his Formula One rivals with plenty to ponder before the weekend.
Rosberg and triple world champion Lewis Hamilton shared testing duties on Tuesday, with the Briton taking over in the afternoon for a race simulation. Together, they did 169 laps without a hitch
Nico Rosberg led from pole to flag to win the Singapore Grand Prix on Sunday and celebrate his 200th Formula One race by retaking the championship lead from Mercedes team mate Lewis Hamilton. After a chaotic start that brought out a safety car on the opening lap, Rosberg stayed clear of a late charging Daniel Ricciardo in a Red Bull at the Marina Bay Street Circuit as Hamilton completed the podium in third place.