after his crash at San Marino, was sixth, the Ferraris split by the March-Judd of Ivan Capelli and the Williams-Renault of Riccardo Patrese. Surprisingly, Capelli's teammate Maurício Gugelmin failed to qualify. Berger, still suffering the effects of his crash, admitted that if not for Ferrari's innovative semi-automatic transmission (which meant he did not have to change gears as with a normal stick shift), he would not have been able to race. The back row of the grid was arguably the best credentialed and most experienced in Grand Prix history, consisting of seven-time winner René Arnoux in the Ligier-Ford and triple World Champion Nelson Piquet in the Lotus-Judd. Qualifying classification Race Race report Senna chose medium compound Goodyear "B" tyres for the race while Prost went for the softer C-compound tyres in the hopes of gaining a speed advantage. Despite the pole being on the dirty side of the track in Mexico, Senna made a better start and was able to lead into the first turn from Mansell, Prost, Berger, Patrese and the Tyrrell-Ford of Michele Alboreto. However, it all meant nothing as Modena spun his Brabham into the Peraltada on the first lap and was tapped by the Ligier of Olivier Grouillard and finished against the tyre wall. Despite the car not being in a dangerous position, the red flag was shown and the race had to be restarted. Senna won the restart and led Prost, a fast starting Berger, Mansell and the Williams pair of Patrese and Thierry Boutsen. Prost, with his softer tyres giving him better grip, soon moved onto the back of his teammate's car. However, Mexico would be where Prost started questioning the power of his Honda V10 compared to the ones used by Senna. For a number of laps Prost, clearly faster through the final Peraltada curve coming onto the main straight, could not make an impression on Senna despite being in his aerodynamic tow on the 1.2 km long main straight. Indeed, the #1 McLaren was seen to pull away from the #2 car on the straight. Running close to his teammate eventually had a detrimental effect on Prost's tyres and he was soon into the pits for a change of rubber. The McLaren team then mistakenly gave the Frenchman another set of C tyres rather than the B's he had come in for. Prost was soon back in for another tyre change and