GP implemented their usual strategy of running with fuel during Friday practice sessions. In the first session, Jenson Button was tenth and Rubens Barrichello was thirteenth. In the second session, Barrichello improved to seventh place, while Button dropped back to thirteenth. That said, Button's lap time was only 0.727 seconds off the fastest time of Hamilton, in an extremely tight session. Jarno Trulli was the top Toyota in both sessions, finishing up sixth and eighth, beating teammate Timo Glock, who was fourteenth and tenth. Renault had a mixed session, with Alonso and Nelson Piquet Jr. struggling to get the ideal setup for the car. Alonso was seven tenths of a second off in both sessions, while Piquet improving to just a tenth and half behind his teammate. Massa and Räikkönen posted times good enough for P7 and P8 in the first session, but were adrift in the second session, with neither driver in the top ten, which left the Ferrari drivers disappointed with the lack of pace. BMW Sauber were another team to struggle in practice, with times some six tenths of a second off the pace, which left both drivers unhappy with the setup. Nick Heidfeld's time in the second session was their best showing, ending up in ninth position. Force India outpaced Toro Rosso in both sessions, with both cars lapping within a second of the best times. Giancarlo Fisichella (16th and 17th) and Adrian Sutil (18th and 16th) were both confident that they could improve on those times on Saturday. Sébastien Buemi found himself doing much of the setup work for the Italian outfit, improving his lap time by eight tenths of a second, between sessions. Alguersuari produced a solid performance in both sessions, but still ranked last in both sessions. Each driver completed 82 laps over the two sessions. McLaren again topped the times during the Saturday practice session with Hamilton posting the best time. Heidfeld was a surprise second for BMW Sauber, with Nico Rosberg in third. Kovalainen was fourth, ahead of the Toro Rosso of Buemi and the Toyota of Glock. Glock's session was far from trouble-free, as his Toyota developed a hydraulic leak during its first flying lap. He returned to the track just before the end of the session, to record the sixth best time. Only seven tenths of a second split Heidfeld in second from Barrichello's Brawn in thirteenth. At one