Stafford reached the quarter-finals of the junior tournament of the French Open in 1989 on the side of Wayne Ferreira ; both won the title at the US Open Junior Championships that same year . The following year he became a professional tennis player. In 1992 he won his first double title on the ATP Challenger Tour . In total, he won eleven Challenger double titles and three Challenger singles titles in the course of his career. In 1993 he was in an individual final on the ATP World Tour in Durban for the first time , but in his three finals he was never able to celebrate a title win. He was more successful in the doubles competition, where he won five ATP doubles titles in the course of his career. He reached his highest ranking in the tennis world rankings in 1994 with position 53 in singles and in 1998 with position 42 in doubles.