Japanese GP: Nelson Piquet, Benetton B190 Ford, leads Roberto Moreno, Benetton B190 Ford, Thierry Boutsen, Williams FW13B Renault, and Riccardo Patrese, Williams FW13B Renault.
Nelson Piquet, Benetton B190 Ford, leads Roberto Moreno, Benetton B190 Ford, Thierry Boutsen, Williams FW13B Renault, and Riccardo Patrese, Williams FW13B Renault.