Having slipped to fourth and fifth in the 2010 F1 world championship standings, Lewis Hamilton and Jenson Button admit that only race wins are likely to keep them in the hunt for a second title.

Hamilton's poor finishing record since the height of summer, and Button's relative lack of podium visits among an otherwise consistent season, have seen the pair slip away from the top table - they were first and second respectively heading to Hungary in July - leaving an uphill struggle to get back on terms with Mark Webber, Sebastian Vettel and Fernando Alonso as the campaign reaches its climax.

"We need to win all of the [remaining races] and that is what we're trying to do," Hamilton told BBC Sport after qualifying fourth for the inaugural Korean Grand Prix, "We're not sat here trying to get fourth place or seventh place. We're doing our best job to get up as high as possible to fight the guys in front of us."

After a disappointing Japanese Grand Prix, where persistent rain prevented the McLaren team from fully evaluating the latest F-duct developments, Hamilton showed better form in free practice to run with the pace-setting Red Bulls, prompting Ferrari's Fernando Alonso to tab him as the favourite for victory. In qualifying, however, the 2008 world champion could only manage fourth place, putting him behind Sebastian Vettel, Webber and Alonso, but he remains optimistic.

"Everything is possible on Sunday," Hamilton insisted, "We've had good starts this year and we're very fast on the straights, so we are in a strong position. Of course, we would have wanted to be on pole, but the team have done a phenomenal job in getting new parts here and the car has felt great all weekend. I think I got more than what we had in the car out of it. I couldn't ask for anymore, [but] I don't know where Red Bull found half a second from.

"I have got to do the best I can with what we have. We can't ask anymore of the guys back at the factory or the guys here and I don't think you could have asked anymore from me."

Button, meanwhile, admitted that it was now a case of 'win or bust' if he was to retain the title that he won with Brawn GP in 2009.

"We have to win the next three races, [but] it's not over yet," he insisted, "It's a lot more difficult because the Red Bulls are on the front row, and they're the people we're trying to take points off. We haven't made it easy for ourselves but, if we have a strong race and the Red Bulls have a messy race, then that's a lot of points. Hopefully, we can have a better day on Sunday and take some points off them."