 Complete the following phrase:  Peter Revson started four races for Lotus in 1964, but returned to the US to drive in sports cars and Indy Cars. He made a guest appearance for Tyrrell at the 1971 United States Grand Prix and, though he did not finish the race, he impressed enough to be signed for McLaren for the following season. He stood on the podium at four of the nine races he attended, and stayed with the team for an even more successful year in 1973. Revson won the 1973 British Grand Prix and the 1973 Canadian Grand Prix, both in wet conditions, but chose to move to Shadow when McLaren offered him only a third car. While testing for the 