His best grand slam singles result was at Wimbledon in 1966, when he reached the semifinals (beating top seed Roy Emerson before losing to Manuel Santana). He was also the 1972 Australian Open and the 1973 US Open men's doubles champion, partnering John Newcombe and Ken Rosewall respectively. He was inducted into the International Tennis Hall of Fame in Newport, Rhode Island in 2010. He was inducted into the Australian Tennis Hall of Fame at the Rod Laver Arena in Melbourne on 26 January 2011 (Australia Day).
