Gregory "Greg" Rusedski (born 6 September 1973, in Montreal, Quebec, Canada) is a British Canadian former tennis player who turned professional in 1991 and played until his retirement on 7 April 2007, at the age of 33. He represented Canada in the early years of his career, before changing to the United Kingdom in June 1995. He is a former British no. 1 and ATP world no. 4.