 Complete the following phrase:  Toyota retained their driver line-up for , but the season proved difficult. Both Toyotas together with Williams cars were disqualified from the Canadian Grand Prix for running illegal parts. Cristiano da Matta, following disappointing performances, left the team after the German Grand Prix and was replaced by fellow Brazilian Ricardo Zonta, who had been the teams third driver. Zonta drove for Toyota for the subsequent four rounds, before being replaced by Italian Jarno Trulli, who had left the Renault works team. Panis, meanwhile, announced his retirement from racing, and bowed out before the final race of the season in 