Spain preview quotes: Sauber

Sergio Perez: "I'm looking forward to the weekend in Barcelona very much. I have been quite unlucky in the previous races and I really have the feeling the Spanish Grand Prix is when this will change. I strongly believe I will score points there. I am very motivated and I like the Barcelona circuit a lot. Also I always did well there. In Turkey we weren't able to show our potential and I hope this changes in Spain and, to begin with, we are better in qualifying. We will bring an update for the car and I trust it will meet our expectations."

James Key, Technical Director: "Barcelona is familiar to everyone. We tested there twice over the winter, but I'm sure in hotter conditions we have to re-evaluate how the tyres are working on the track. It's another circuit which is quite hard on tyres, and turn three in particular is hard on the left hand side of the car. It's going to be a case of looking at tyre degradation and durability on Friday, and trying to come to some conclusions. Barcelona is a relatively high speed track, so one which should be quite reasonable for our car. After the race performance in Istanbul that could be good for us, but we need to improve our qualifying performance.

"We'll have a new, quite significant aero package on the car, which will be a completely new front wing, updates to the front and rear brake ducts, new bodywork, new devices around the floor leading edge and under the chassis, and we'll be testing the new exhaust system again. We'll also be continuing our work on the mechanical update we had in Istanbul, which proved to be positive. So it will be interesting to see how this works. If it works well it should give us a good few tenths of a second improvement in lap time. Our goal is to continue our good race form, to try to improve qualifying and finish as high in the points as possible."