As the McLarens pulled away Mansell, Patrese, and Nannini were busy fighting over third place. It was settled in the space of three laps as Patrese retired with a timing belt failure and Mansell followed shortly afterwards with a gearbox problem. This left Nannini in third while up front Senna cruised home to victory from Prost who, in his pursuit of Senna, had suffered a spin on lap 42 at Variante Bassa. Nannini led home Thierry Boutsen, Derek Warwick in the Arrows and Jonathan Palmer in the Tyrrell. Olivier Grouillard was disqualified because Ligier illegally repaired his car on the grid before the second start. Thierry Boutsen and Alex Caffi were initially disqualified after a protest from Ligier because they had changed tyres in the pitlane before the second start, but were reinstated following an appeal.