Detroit GP: Alain Prost, Renault RE30B, battles with Keke Rosberg, Williams FW08 Ford, at the start. They lead Didier Pironi, Ferrari 126C2, Bruno Giacomelli, Alfa Romeo 182, Eddie Cheever, Ligier JS17 Matra, and Nigel Mansell, Lotus 91 Ford.
Alain Prost, Renault RE30B, battles with Keke Rosberg, Williams FW08 Ford, at the start. They lead Didier Pironi, Ferrari 126C2, Bruno Giacomelli, Alfa Romeo 182, Eddie Cheever, Ligier JS17 Matra, and Nigel Mansell, Lotus 91 Ford.