San Marino GP: Ayrton Senna, McLaren MP4-4 Honda, leads Nelson Piquet, Lotus 100T Honda, Alessandro Nannini, Benetton B188 Ford, Alain Prost, McLaren MP4-4 Honda, Gerhard Berger, Ferrari F1/87-88C, Riccardo Patrese, Williams FW12 Judd, and Eddie Cheever, Arrows A10B Megatron, at the start.
Ayrton Senna, McLaren MP4-4 Honda, leads Nelson Piquet, Lotus 100T Honda, Alessandro Nannini, Benetton B188 Ford, Alain Prost, McLaren MP4-4 Honda, Gerhard Berger, Ferrari F1/87-88C, Riccardo Patrese, Williams FW12 Judd, and Eddie Cheever, Arrows A10B Megatron, at the start.