He struggled with constant knee and groin problems throughout his career, which eventually forced his retirement from the professional circuit in November 2006.

[1] Lee's best singles result on the ATP Tour was to reach the final of the Hall of Fame Championships in Newport, Rhode Island in 2001.

Lee's ranking also ensured automatic qualification for the main draw of the Australian and French Opens in 2002, but he lost in the first round on both occasions.

Lee won two of his three matches for Great Britain in the Davis Cup, however these were only dead rubbers.

Lee lost his only live match against Thailand's Paradorn Srichaphan in straight sets.