Due to Berger's retirement, Thierry Boutsen climbed to 4th behind Michele Alboreto and ahead of a thrilling battle between Alessandro Nannini, Satoru Nakajima, Nelson Piquet, and the two Arrows.
Ovinek "Eau Rouge" je Senna odpeljal hitreje od Prosta, zato je lahko izkoristil zavrtje na ravnini "Kemmel " in ob zaviranju pred ovinkom "Les Combes" je prevzel vodstvo.