his teammates settings actually suited his own driving style, plus they were easier on the car). At Spa Prost decided at the last minute to alter the settings on his car by taking off some wing for more straight line speed in a bid to gain an advantage. Unfortunately for the Frenchman this had a detrimental result and he was unhappy with the balance and handling of his car in the race, compared to Senna with Prost's original settings who reported no such problems. At the start, pole sitter Senna had too much wheelspin and Prost was able to take the lead. However, the first time through Eau Rouge, Senna, with better downforce and grip, was clearly quicker and easily retook the lead after he slipstreamed Prost on the Kemmel Straight and out braked him at Les Combes. Senna powered off into the distance while Prost, struggling with a car that was no longer handling to his liking, settled for second place. Gerhard Berger managed to get his Ferrari up to 3rd, challenging Prost briefly before pitting on lap 3 with electrical problems. He managed to rejoin and set the fastest lap before retiring on lap 12. Due to Berger's retirement, Boutsen climbed to 4th behind Alboreto and ahead of a thrilling battle between Alessandro Nannini (Benetton), Nakajima, Nelson Piquet (Lotus), and the two Arrows-Megatrons of Derek Warwick and Eddie Cheever. Piquet passed teammate Nakajima on lap 17, before the Japanese driver pitted with an acute misfire from a jammed plug, which caused him to retire. In the meantime, Ivan Capelli climbed from ninth to sixth in his March-Judd. On lap 36, Alboreto's engine blew at Les Combes, sending him out of the race from third. On lap 38, Nannini passed Piquet for fourth at the La Source hairpin, before Capelli overtook the Brazilian driver for fifth on the penultimate lap. McLaren's 1-2 sealed the Constructors' Championship for the British team with five races remaining. Boutsen and Nannini came home third and fourth for Benetton, with Capelli and Piquet rounding out the top six. In a post-race interview, Prost virtually conceded the championship to Senna, who had won his fourth race in succession and had taken the championship lead for the first time. Post-race Both Benettons were later disqualified for using irregular fuel, so the third podium spot went to Ivan Capelli. It was his first podium finish in Formula