Renault did not demonstrate the same level of pace as in previous seasons, which had seen them win successive World Championships. It remains unclear whether the difference was due to the change of tyre supplier from Michelin to Bridgestone, the driving abilities of Fernando Alonso, or simply being outpaced in off-season development by the other top teams. Another possibility is that the team's wind tunnel was giving inaccurate data in late 2006 which affected the development of the 2007 car. This was cited by Pat Symonds in an issue of F1 Racing Magazine. In the early races, Fisichella obtained better results than rookie teammate Kovalainen, but in Canada and the USA it was the Finn who claimed the higher finishes. Fisichella was disqualified from the Canadian Grand Prix, along with Ferrari's Felipe Massa, for exiting the pit lane while the traffic light was showing red, the purpose of which is to prevent cars rejoining the race ahead of the safety car. He later stated that he had been busy avoiding other cars in the pit lane and had simply not noticed the red light. The Renault team seemed to have made significant progress in terms of pace by the Spanish Grand Prix, but a series of fuel rig problems meant that neither driver was able to capitalise on this apparent increase in performance. Fisichella crashed into the Super Aguri of Anthony Davidson at the 2007 Hungarian Grand Prix which broke his rear suspension and forced him to retire.