Behind the leading pair, after his initial charge, Gerhard Berger's Ferrari gearbox failed on lap 34, and the sister Ferrari of Nigel Mansell suffered engine failure nine laps later. With the Scuderia's cars gone, all real challenge to the McLaren charge had evaporated. The only opposition left for Senna and Prost was each other as they were drawing away from the new third placed man Alessandro Nannini. The Italian's Benetton used the less powerful, but more reliable, HBA1 engine in the race and not the development HBA4. His teammate Emanuele Pirro did use the development V8 in the race, and while he was not as quick as Nannini, he did use it to move up to 10th after starting 22nd. Pirro's race ended on lap 33 after a collision at the hairpin with Andrea de Cesaris where Pirro ran into the back of his fellow Italian's Dallara.