Nick Heidfeld, Renault, Spa, 2011Nick Heidfeld expects his Renault future to be resolved in three weeks after confirming that he has launched legal action against the team.

The German, whose case is expected to be heard on Sept. 19, insists that he has a contract to race with for Renault and he wants to get back into the car after being replaced by reserve driver Bruno Senna for this weekend's Belgian Grand Prix.

"The main hearing will be in about three weeks and we will have a decision then," Heidfeld told Reuters. "My position is that I have a valid contract and I want to drive."

Heidfeld was at Spa today in order to honor the terms of his contract, but he insists that his deal means that he must be a "main driver" for the team.

"I have a contract with them as a main driver and that's why I am here," he said.

Senna has confirmed that he will also be in the car for the Italian Grand Prix in two weeks, which comes before Heidfeld's court hearing. This means that the German could return to action for the Singapore Grand Prix if he is successful in his bid.