Australian Mark Webber has reaffirmed his commitment to the Williams team in the wake of speculation that he wants to switch to Renault for 2006.
Webber has had a disappointing season with Williams
The 28-year-old said he wants to stand by Williams despite their slump into uncompetitiveness this season.
"I am 100% behind the team even though we're not where we want to be in terms of performance," Webber told Autosport.
"This has been a tough season, but I want to keep pushing and for us all to come through the other side."
Williams have not confirmed an engine deal for 2006 following the decision by long-term partner BMW to set up its own team by buying Sauber.
Williams are expected to use Cosworth engines, which would mean they are without a factory deal - considered to be a requirement for success.
BMW's decision also means Williams will lose millions of pounds of financial support that was provided by the German manufacturer.
Webber is managed by Renault team boss Flavio Briatore, and rumours had suggested he and current Renault driver Giancarlo Fisichella could be swapped.
Fisichella has had a disappointing season, in which he has been totally overshadowed by team-mate and world championship leader Fernando Alonso.