San Marino GP: Ayrton Senna, McLaren MP4-5B Honda, leads Thierry Boutsen, Williams FW13B Renault, and Gerhard Berger, McLaren MP4-5B Honda.
Ayrton Senna, McLaren MP4-5B Honda, leads Thierry Boutsen, Williams FW13B Renault, and Gerhard Berger, McLaren MP4-5B Honda.