San Marino GP: Ayrton Senna, Lotus 98T Renault, leads Nelson Piquet, Williams FW11 Honda, Alain Prost, McLaren MP4-2C TAG, Nigel Mansell, Williams FW11 Honda, Michele Alboreto, Ferrari F1/86, and Stefan Johansson, Ferrari F1/86, at the start.
Ayrton Senna, Lotus 98T Renault, leads Nelson Piquet, Williams FW11 Honda, Alain Prost, McLaren MP4-2C TAG, Nigel Mansell, Williams FW11 Honda, Michele Alboreto, Ferrari F1/86, and Stefan Johansson, Ferrari F1/86, at the start.