to 3rd on the run to the Rettifilo his engine began to misfire and would not run properly again. This allowed Senna to power past into the lead before the chicane. Berger followed Prost with Alboreto, Cheever, Boutsen, Patrese and Piquet running in line. Senna built up a 2-second lead after the first lap and Prost, realising after the first lap that the misfire was not going away, decided to turn his boost up to full and give chase to his teammate. Berger had initially given chase and stayed within a couple of seconds of Prost, but before lap 10 had started to drop back in order to save fuel. By lap 30 the Frenchman had reduced Senna's lead to only 2 seconds, but as he went by the pits at the end of lap 30 the misfire suddenly got worse and by lap 35 had been passed by Berger and Alboreto and was heading for the pits and his first mechanical retirement of the season (and the only time in 1988 that a McLaren would retire due to engine failure). While this was happening Alboreto, troubled by gear selection problems early in the race, had dropped back from Berger to allow his gearbox oil to cool hoping it would come good. It did and the Italian in the All-Italian car began to charge at the Italian Grand Prix, and was catching his teammate. Later in the race Berger and Alboreto began closing on Senna rapidly, though it was assumed that Senna was merely pacing himself to the finish, and Senna himself later said that he had things well in hand. With two laps remaining, Senna attempted to lap the Williams of Schlesser at the Rettifilo. Senna headed to the left to pass the Frenchman on the inside of the first chicane, but Schlesser locked his brakes and the Williams slid forward towards the gravel trap. Using his rallying skills, Schlesser managed to collect the car and turned left to avoid going off. Senna, who had taken his normal line and had not counted on Schlesser regaining control, was struck in the right rear by the Williams, breaking the McLaren's rear suspension and causing the car to spin and beach itself on a kerb, putting the Brazilian out of the race. BBC commentator James Hunt placed the blame squarely on Schlesser, although many felt that Senna had not given any