Budapest - Nico Rosberg says he his keeping his options open about which team he will be racing with in 2010.

The 24-year-old's contract with Williams runs out at the end of the season and Rosberg, who has finished in the points in the last five races culminating in a fourth place at the German Grand Prix, is certain to be a target of several teams.

"Obviously from my side, McLaren and BMW would be interesting options for next season," Rosberg said in an interview with German Press Agency dpa ahead of Sunday's Hungarian GP.

However, the German refused to rule out remaining at Williams for a fifth year.

"Williams are currently the third-strongest team along with Ferrari. That's a very good position and as a result Williams is also a possibility for next year, not least because I still have a lot of faith in the abilities of the people there."

Rosberg added that he wants to make the decision "sooner rather than later" but at the moment has no schedule in mind. (dpa)