On 8 July, 2010, the Thursday before the British Grand Prix, the HRT F1 Team (HRT) announced that Bruno Senna would be replaced by test driver Sakon Yamamoto. After the British race, HRT announced that Senna would return to his seat and race the number 21 car. HRT also announced that Yamamoto would replace Karun Chandhok at the German Grand Prix in Hockenheim.