now did not fit properly, and it flew off on Bruno Giacomelli's shakedown lap, halfway through the session. It was slightly damaged and the team had no replacement, so no further running was possible. Pre-qualifying classification Qualifying report Tyrrell's Satoru Nakajima qualified 20th but withdrew due to influenza after crashing in the Sunday morning warm-up session. The grid was adjusted accordingly, although only 25 drivers started as no non-qualifier was reinstated. Qualifying classification Race Race report At the start, with both Ferraris on the front row (Mansell on pole, Alain Prost second), Mansell got too much wheelspin and slid across the track towards Prost, who had to avoid being shunted into the pitwall. All of this allowed the McLarens of Ayrton Senna and Gerhard Berger to slip past Mansell and Prost to make it a McLaren 1–2 with Senna leading into the first corner. After all the mid race tyre stops, it was Senna who emerged as the race leader, followed by Mansell, Berger, and Prost. A few laps later Mansell had caught Senna and passed him into turn one (Senna letting him through, unlike the year before when they collided). On lap 52, race leader Nigel Mansell was attempting to lap the Ligier JS33B of Philippe Alliot when the Frenchman stuck to the racing line by driving inches in front of Mansell into the inside of "Curva 2" corner. However, the right rear wheel of his car hit the left front of Mansell's Ferrari and Alliot was sent spinning into the Armco barrier. Mansell came out unscathed from this incident, and eventually won the race which was stopped early due to an accident between Suzuki and Caffi. Ferrari announced that Jean Alesi would partner Alain Prost for 1991. Alesi was reported to have already signed a contract with Williams, but changed his mind when Ferrari showed an interest, feeling that this would give him a better chance of winning a championship. Race classification Championship standings after the race Drivers' Championship standings Constructors' Championship standings References Portuguese Grand Prix Portuguese Grand Prix Grand Prix