However, the biggest incident of the year happened at the Italian Grand Prix at Monza. With two laps remaining, Senna held a five-second lead over the Ferraris of Gerhard Berger and Michele Alboreto, who were closing in on the McLaren (Prost had earlier retired with a badly misfiring engine). Going into the Rettifilo Chicane, Senna closed on the Williams of Jean-Louis Schlesser (standing in for the unwell Nigel Mansell). Schlesser steered wide, attempting to give Senna room to lap him, losing then regaining control to avoid going into the sand trap, and the two collided; Senna's car was beached on top of a curb and had stalled. Ferrari went on to finish 1–2, the first in an Italian Grand Prix since the death of the team's founder Enzo Ferrari. This proved to be the only race McLaren did not win in 1988.