Italian GP: Nelson Piquet, Williams FW11B Honda, leads Nigel Mansell, Williams FW11B Honda, Gerhard Berger, Ferrari F1-87, Ayrton Senna, Lotus 99T Honda, Alain Prost, McLaren MP4-3 TAG, Thierry Boutsen, Benetton B187 Ford, and Teo Fabi, Benetton B187 Ford.
Nelson Piquet, Williams FW11B Honda, leads Nigel Mansell, Williams FW11B Honda, Gerhard Berger, Ferrari F1-87, Ayrton Senna, Lotus 99T Honda, Alain Prost, McLaren MP4-3 TAG, Thierry Boutsen, Benetton B187 Ford, and Teo Fabi, Benetton B187 Ford.