at the Autodromo Nazionale Monza, Schumacher suffered a high-speed accident where he sustained a concussion. He was taken for a precautionary check at the circuit's medical centre before he was transferred to San Rafaele hospital. Although he had participated in the event's first qualifying session, Schumacher decided to withdraw and his place was taken by Williams test driver Marc Gené. He returned for the United States Grand Prix where he retired having suffered an accident resulting from his car sliding on a wet track surface. At the season finale in Japan, Schumacher finished 12th despite spinning his car three times. He finished the season fifth in the Drivers' Championship, with 58 points, and helped Williams clinch second in the Constructors' Championship. 2004 Schumacher remained at Williams for 2004 and continued to be partnered by Montoya. Schumacher was ambitious for the season, saying: "I can say that we'll come up with a car that will be competitive from the very first race of the new season". He made a good start to his season by finishing fourth in the opening round in Australia, although he retired from the next race in Malaysia from an engine failure. He managed to secure consecutive seventh-place finishes in the next two rounds, before finishing outside the points in Monaco. Schumacher was forced into retirement on the opening lap of the European Grand Prix due to a collision. At the Canadian Grand Prix, Schumacher qualified on pole position and went on to finish second in the race, but was later disqualified for irregularities on his car's brake ducts. At the United States Grand Prix, Schumacher suffered serious injuries in an accident that occurred on the ninth lap of the race. The deceleration was measured at 78 g (765 m/s²), resulting in a concussion as well as two minor fractures to his spinal column. Schumacher was forced to miss the next six races. Williams driver Marc Gené substituted for Schumacher for the races in France and Britain, with Antônio Pizzonia taking over the role for the next four races. In July, Schumacher signed a three-year contract with the Toyota team. He was passed fit for the Italian Grand Prix, but ultimately returned for the Chinese Grand Prix, where he retired from a puncture. Schumacher followed up the result by taking second place in Japan, and a fifth place at the final round in Brazil. He finished the