Perez: Sauber must build on promise

Sergio Perez says Sauber has good reason to optimistic for the opening races of 2012 after labelling the new C31 as a good starting point to work from this season. But he insisted that the Swiss team must keep working hard to develop the car right up to the first race in Melbourne to capitalise on it. The Mexican, who impressed on his debut at Melbourne nearly a year ago by finishing seventh on the road, was second fastest overall after two days of testing at Barcelona and ended Wednesday just 0.040s slower than the best time - set by Force India's Nico Hulkenberg

Georges Grignard Brad Keselowski Gary Hocking Jeremy Allan Mayfield Toyota Kimmy Yuji Ide