Career
In 1973, Simpson reached the third round of both Wimbledon and the United States Open. Those performances saw him reach his career best ranking of 66. Simpson was a singles semi-finalist at Newport in 1973 and Auckland in 1975.
As a doubles player he was runner-up at two Grand Prix events, in Christchurch and Roanoke.
He also coached New Zealand in the 1988 Summer Olympics and 1996 Summer Olympics. Singles: (1).