As in , the McLaren team had been dominant throughout 1989. Going into this race, Prost had a 16-point lead in the Drivers' Championship over Senna, 76 to 60. The Brazilian had won six races to the Frenchman's four, including the previous race in Spain, but had only finished in the points on one other occasion, while Prost had only finished out of the points once all season. Therefore, Senna had to win both this race and the final race in Australia to have any chance of retaining his World Drivers' Championship. However, if Senna did win the last two races, he would be champion regardless of where Prost finished, due to the dropped scores system.
