The 1989 Portuguese Grand Prix (formally the XXIII Grande Premio de Portugal) was a Formula One motor race held at the Autódromo do Estoril in Estoril, Portugal on 24 September 1989. The 71-lap race was the thirteenth of the 1989 Formula One season. It was won by Gerhard Berger to take his first, and only, victory of the season for Ferrari. Alain Prost finished in second place for McLaren, strengthening his championship chances after his team-mate and rival Ayrton Senna had been involved in a collision with Ferrari driver Nigel Mansell which resulted in them both retiring. Mansell had just been black flagged at the time of incident for reversing back into his pit box after overshooting it during a stop. The podium was completed by Stefan Johansson, who took both his last and Onyx's only po