as the third driver was GP2 driver Michael Ammermüller. Toro Rosso announced during the week leading up to the Grand Prix, that they had signed Alex Hitzinger as their new technical director to replace Gabriele Tredozi. Hitzinger began his role in November 2006. Spyker MF1 announced their first driver for 2007 during the weekend, which was Dutch driver Christijan Albers. Super Aguri's Takuma Sato had a dismal start to the weekend as he was demoted ten places on the grid as his team changed the Honda engine in his car. Sato had been due to continue using the Honda V8 he ran at the last round in Italy, but the discovery of a problem, which had not been disclosed by Super Aguri, had prompted the team to replace the engine ahead of the Friday first practice session. Friday practice Alexander Wurz was fastest in the first Friday practice session in the Williams-Cosworth, 0.004 seconds faster than BMW Sauber's third driver, Sebastien Vettel and Jenson Button completed the top three, over six-tenths slower than Wurz. Michael Schumacher, Neel Jani and Alexandre Prémat completed the top six; all within 0.07 seconds of each other. While Schumacher's championship rival, Fernando Alonso, did not set a time along with his teammate, Giancarlo Fisichella. Wurz and Vettel were fastest again in the second session, Wurz was fastest with a 1:35.539, around 0.03 seconds faster than he was in the first session and 0.05 seconds faster than Vettel with Honda's Anthony Davidson completing the top three positions. The Austrian was very happy with his time, specially since this was his first time in Shanghai, "It was a good day today and driving was a lot of fun out there. I have never driven this circuit, and I attacked it right from the beginning" he said. Championship rivals, Michael Schumacher and Fernando Alonso, were within a tenth of a second of each other in fifth and sixth, respectively. Felipe Massa dropped ten places from the grid after his engine gave way during the session. Friday drivers The bottom 6 teams in the 2005 Constructors' Championship and Super Aguri were entitled to run a third car in free practice on Friday. These drivers drove on Friday but did not compete in qualifying or the race. Race It rained heavily before the start of the race, suiting the Michelin runners and disadvantaging the Bridgestone runners. Fernando Alonso led away