Senna's relationship with German rising star Michael Schumacher, who was showing exceptional form at every race was never a good one, possibly because Senna saw Schumacher as a threat to his supremacy in F1. At the 1992 Brazilian Grand Prix, Schumacher accused Senna of 'playing around' while attempting to overtake Senna, who had a problem with his engine. At the French Grand Prix, Schumacher collided with Senna, resulting in Senna's retirement. Senna later confronted Schumacher, who admitted responsibility for the accident. At a test session for the German Grand Prix, Senna and Schumacher had a confrontation in the pits, with Senna grabbing Schumacher by the collar and accusing him of endangering him by blocking him on the track.