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