Nico Rosberg insists he is happy at Mercedes but has admitted other teams are interested.
With German Rosberg faster than Michael Schumacher in the past two seasons but still seeking his debut victory, team boss Ross Brawn asked the 25-year-old to have "faith" in Mercedes to eventually build him a winning car.
"I have the opportunity to help the team, and it's a fantastic opportunity," Rosberg is quoted by Brazil's Globo Esporte.
"I wouldn't say I'm uncomfortable or something, I feel very comfortable in being part of a project and challenge like this.
"But of course, I am a racing driver, and above all, I want to win. I wouldn't say I'm impatient for it, but I hope for it soon. I just need to judge whether the team will be able (to win) soon, but it is a fact that the team will succeed eventually.
When there is interest from other teams it's a good thing for my career
"The big question is when and at the moment it seems that it will still take a while."
Rosberg, linked with Ferrari, McLaren and championship leaders Red Bull, admitted that the speculation is doing him no harm.
"Obviously when there is interest from other teams it's a good thing for my career. But it's a matter of time. Nothing more than that," he said.