Detroit GP: Eddie Cheever, Arrows A10 Megatron, leads Teo Fabi, Benetton B187 Ford, Michele Alboreto, Ferrari F1-87, a sideways Alain Prost, McLaren MP4-3 TAG, Thierry Boutsen, Benetton B187 Ford, Gerhard Berger, Ferrari F1-87, Stefan Johansson, McLaren MP4-3 TAG, and Derek Warwick, Arrows A10 Megatron.
Eddie Cheever, Arrows A10 Megatron, leads Teo Fabi, Benetton B187 Ford, Michele Alboreto, Ferrari F1-87, a sideways Alain Prost, McLaren MP4-3 TAG, Thierry Boutsen, Benetton B187 Ford, Gerhard Berger, Ferrari F1-87, Stefan Johansson, McLaren MP4-3 TAG, and Derek Warwick, Arrows A10 Megatron.