Despite Prost already claiming two Formula One World Championships, the relentless nature of Senna's driving style often challenged the calculated nature of Prost's style. Their contrasting approaches to racing, in combination with both men having a dominant car, it was inevitable that there would be highly controversial moments on and off the track. Throughout their time in Formula One Prost finished with 51 wins and 4 world championships. Senna, before his death in the 1994 San Marino Grand Prix had 41 wins and 3 world championships to his name.