A former lawn tennis player, Chisholm switched to the original game of tennis around the year 2000. He became the head professional at the Racquet and Tennis Club in New York City. In 2001, he won the first World Doubles Championship, partnered by Julian Snow. Although technically not a Grand Slam, at one point in 2003 Chisholm held all four major open titles at the same time.
Chisholm challenged former World Champion Robert Fahey three times for the singles title. The 2002 challenge was the closest, going the full 13 sets. In 2004, Chisholm lost the challenge 7–1 sets. He then retired as head professional at the Racquet Club and took an office job in Boston, Massachusetts, only playing in American tournaments. In January 2006, he decided to attempt the World Challenge again, and although he won his preliminary matches handily, he fell to Fahey 7–0 in the championship.
Chisholm is married to Darcey and they have three children.
- Australian Open: 2003
- British Open: 2002
- French Open: 2003
- U.S. Open: 2003, 2004
- Schochet Cup (formerly U.S. Professional): 2002
- Jones, Sally (November 28, 2002). "Real Tennis: Chisholm earns chance to challenge old order". The Independent. Retrieved June 8, 2015.
- Jones, Sally (November 29, 2001). "Real Tennis: Chisholm determined to beat world champion". The Telegraph. Retrieved June 8, 2015.
- Dawson, Kyle (June 7, 2015). "Court King: Riviere remains real tennis royalty". Aiken Standard. Retrieved June 8, 2015.
- International Real Tennis Professionals Association: Tim Chisholm profile