San Marino GP
Ayrton Senna, McLaren MP4-4 Honda, leads Nelson Piquet, Lotus 100T Honda, Alessandro Nannini, Benetton B188 Ford, Gerhard Berger, Ferrari F1/87-88C, Riccardo Patrese, Williams FW12 Judd, and a slow-starting Alain Prost, McLaren MP4-4 Honda, at the start.