Ayrton Senna was denied both pole and victory for the first time all season in Canada, as Riccardo Patrese took pole and Nelson Piquet stole victory. Patrese's team mate, Nigel Mansell looked set to win having led every lap, until a late gearbox issue caused him to retire on the final lap, handing victory to Piquet. Stefano Modena beat Patrese to second while Senna retired before the halfway mark in his McLaren-Honda, while the new Jordan Grand Prix team collected their first points in Formula One.