Michael Schumacher was given a five-place penalty on the starting grid for the Monaco Grand Prix after the German crashed into Bruno Senna at the Spanish Grand Prix on Sunday.
Schumacher, seven times world champion, could be heard branding Brazilian Senna an "idiot" on his team radio after the crash but race stewards found him at fault.
The showcase Monaco Grand Prix, which Schumacher has won five times in his career, is on May 27. Overtaking on the tight and twisty circuit is extremely difficult, putting a premium on grid position.
Schumacher, who drives for Mercedes, and Senna of Williams both had to retire after the crash on lap 13 of 66 at the Circuit de Catalunya.
Schumacher, 43, has failed to recapture past glories since coming out of retirement in 2010. He has picked up only two points from five races this season while team mate Nico Rosberg won in China last month.
Williams' driver Pastor Maldonado of Venezuela won the grand prix, giving his team their first victory since 2004.