barely clinging on (Boutsen retired on lap 5 after being punted off by Pirro at the Bremsschikane 2). On lap 14, Mansell had been hounding Berger for 2 laps, Berger had a puncture right when approaching the first chicane, and he went up on the marker, launching his Ferrari in midair, landing on a grassy patch and went across the track, just barely avoiding Mansell and came to rest on the trackside grass. Prost and Senna were on the limit the entire race and Prost hounded Senna for 16 laps, until he went in for his pit stop for tyres, which was a slow one of 18 seconds, which put Mansell in second place and gave Senna a stronger lead. The next lap, Mansell came into the pits for his tyre change and his pit stop was faster than Prost's but still a poor stop of 11 seconds, which dropped him down back to fourth behind, Senna, Pirro and Prost. Senna decided to take advantage of his lead and came into the pits for his tyre change, his stop was even worse than Prost's, lasting 23 seconds. This dropped him down to second behind Prost and Pirro had come into the pits for a tyre change and dropped to fourth. Pirro crashed into the styrofoam barriers at the stadium entrance on lap 26 and had to be taken to the hospital after one of the barriers had hit his helmet. With Mansell having problems with his Ferrari, Senna and Prost battled for the entire race, as both drivers were driving on the limit. They started trading off fastest laps and Prost held off Senna for almost the entire race. On lap 43, Prost's gearbox malfunctioned, lost sixth (top) gear and Senna passed him at turn 11. Prost limped around the track for the next 2 laps and Senna cruised around the track to grab his fourth victory of the season, followed by Prost second, Mansell third, Patrese fourth, Piquet fifth and Derek Warwick (Arrows-Ford) sixth. In the post race press conference, Senna refused to speculate on whether he would have been able to pass Prost if he hadn't lost top gear, instead stating that winning after suffering four straight DNFs was all he was concerned about. For his part, Prost was of the firm belief that he would have had no trouble holding on for the win had he not