Knowles played singles and doubles for the Bahamas Davis Cup team for more than 13 years and he is a five-time Olympian.
He annually holds a charity tournament on Paradise Island, off his home island of New Providence, from which all proceeds go to local children's charities. The Mark Knowles Celebrity Tennis Invitational debuted in 2001 and it is attended by players such as Andre Agassi and James Blake, Jim Courier, Tommy Haas and The Bryan Brothers.
His long-term partnership with Daniel Nestor ended after the 2007 U.S. Open. Nestor decided it was time to try playing with a new partner. Knowles then played with former Grand Slam doubles champion Mahesh Bhupathi, though their unity was delayed due to back injury by the latter. This partnership broke up and Knowles plays with a handful of different partners, most often with Mardy Fish.
Knowles partnered with Nestor once again, and won the 2007 Tennis Masters Cup. They defeated Simon Aspelin and Julian Knowle 6–3, 6–2 to take their first Tennis Masters Cup title. This team doesn't plan to play with each other again.
Knowles is married and has three children.
| Outcome |
No. |
Date |
Tournament |
Surface |
Partner |
Opponents in the final |
Score in the final |
| Winner |
1. |
August 2, 1993 |
Montreal, Canada (1) |
Hard |
Jim Courier |
Glenn Michibata
David Pate |
6–4, 7–6 |
| Runner-up |
1. |
March 21, 1994 |
Miami, U.S. |
Hard |
Jared Palmer |
Jacco Eltingh
Paul Haarhuis |
6–7, 6–7 |
| Winner |
2. |
September 19, 1994 |
Bogotá, Colombia |
Clay |
Daniel Nestor |
Luke Jensen
Murphy Jensen |
6–4, 7–6 |
| Runner-up |
2. |
January 30, 1995 |
Australian Open, Melbourne |
Hard |
Daniel Nestor |
Jared Palmer
Richey Reneberg |
3–6, 6–3, 3–6, 2–6 |
| Winner |
3. |
April 17, 1995 |
Tokyo, Japan |
Hard |
Jonathan Stark |
John Fitzgerald
Anders Järryd |
6–3, 3–6, 7–6 |
| Runner-up |
3. |
August 14, 1995 |
Cincinnati, U.S. |
Hard |
Daniel Nestor |
Todd Woodbridge
Mark Woodforde |
2–6, 0–3, RET |
| Winner |
4. |
August 21, 1995 |
Indianapolis, U.S. (1) |
Hard |
Daniel Nestor |
Scott Davis
Todd Martin |
6–4, 6–4 |
| Winner |
5. |
January 8, 1996 |
Doha, Qatar (1) |
Hard |
Daniel Nestor |
Jacco Eltingh
Paul Haarhuis |
7–6, 6–3 |
| Winner |
6. |
February 5, 1996 |
Shanghai, China |
Carpet |
Roger Smith |
Jim Grabb
Michael Tebbutt |
4–6, 6–2, 7–6 |
| Winner |
7. |
February 26, 1996 |
Memphis, U.S. (1) |
Hard (i) |
Daniel Nestor |
Todd Woodbridge
Mark Woodforde |
6–4, 7–5 |
| Runner-up |
4. |
April 22, 1996 |
Tokyo, Japan |
Hard |
Rick Leach |
Todd Woodbridge
Mark Woodforde |
2–6, 3–6 |
| Winner |
8. |
May 13, 1996 |
Hamburg, Germany (1) |
Clay |
Daniel Nestor |
Guy Forget
Jakob Hlasek |
6–2, 6–4 |
| Winner |
9. |
August 12, 1996 |
Cincinnati, U.S. (1) |
Hard |
Daniel Nestor |
Sandon Stolle
Cyril Suk |
3–6, 6–3, 6–4 |
| Runner-up |
5. |
August 26, 1996 |
Toronto, Canada |
Hard |
Daniel Nestor |
Patrick Galbraith
Paul Haarhuis |
6–7, 3–6 |
| Runner-up |
6. |
February 17, 1997 |
San Jose, U.S. |
Hard (i) |
Daniel Nestor |
Brian MacPhie
Gary Muller |
6–4, 6–7, 5–7 |
| Winner |
10. |
March 17, 1997 |
Indian Wells, U.S. (1) |
Hard |
Daniel Nestor |
Mark Philippoussis
Patrick Rafter |
7–6, 4–6, 7–5 |
| Runner-up |
7. |
March 31, 1997 |
Miami, U.S. |
Hard |
Daniel Nestor |
Todd Woodbridge
Mark Woodforde |
7–6, 7–6 |
| Winner |
11. |
May 19, 1997 |
Rome, Italy (1) |
Clay |
Daniel Nestor |
Byron Black
Alex O'Brien |
6–3, 4–6, 7–5 |
| Runner-up |
8. |
June 8, 1998 |
French Open, Paris |
Clay |
Daniel Nestor |
Jacco Eltingh
Paul Haarhuis |
3–6, 6–3, 3–6 |
| Winner |
12. |
August 17, 1998 |
Cincinnati, U.S. (2) |
Hard |
Daniel Nestor |
Olivier Delaître
Fabrice Santoro |
6–1, 2–1, RET |
| Runner-up |
9. |
August 24, 1998 |
Indianapolis, U.S. |
Hard |
Daniel Nestor |
Jiří Novák
David Rikl |
2–6, 6–7 |
| Runner-up |
10. |
September 14, 1998 |
US Open, New York |
Hard |
Daniel Nestor |
Cyril Suk
Sandon Stolle |
6–4, 6–7, 2–6 |
| Runner-up |
11. |
November 22, 1998 |
Doubles Championships, Hartford |
Carpet |
Daniel Nestor |
Jacco Eltingh
Paul Haarhuis |
4–6, 2–6, 5–7 |
| Runner-up |
12. |
March 8, 1999 |
Scottsdale, U.S. |
Hard |
Sandon Stolle |
Justin Gimelstob
Richey Reneberg |
4–6, 7–6(7–4), 3–6 |
| Winner |
13. |
January 10, 2000 |
Doha, Qatar (2) |
Hard |
Max Mirnyi |
Alex O'Brien
Jared Palmer |
6–3, 6–4 |
| Runner-up |
13. |
April 17, 2000 |
Atlanta, U.S. |
Clay |
Justin Gimelstob |
Ellis Ferreira
Rick Leach |
3–6, 4–6 |
| Winner |
14. |
November 27, 2000 |
Stockholm, Sweden |
Hard (i) |
Daniel Nestor |
Petr Pála
Pavel Vízner |
6–3, 6–2 |
| Winner |
15. |
January 8, 2001 |
Doha, Qatar (3) |
Hard |
Daniel Nestor |
Juan Balcells
Andrei Olhovskiy |
6–3, 6–1 |
| Winner |
16. |
March 5, 2001 |
San Jose, U.S. |
Hard (i) |
Brian MacPhie |
Jan-Michael Gambill
Jonathan Stark |
6–3, 7–6(7–4) |
| Winner |
17. |
August 20, 2001 |
Indianapolis, U.S. (2) |
Hard |
Brian MacPhie |
Mahesh Bhupathi
Sébastien Lareau |
7–6(7–5), 5–7, 6–4 |
| Winner |
18. |
January 28, 2002 |
Australian Open, Melbourne |
Hard |
Daniel Nestor |
Michaël Llodra
Fabrice Santoro |
7–6(7–4), 6–3 |
| Runner-up |
14. |
February 25, 2002 |
Rotterdam, Netherlands |
Hard (i) |
Daniel Nestor |
Roger Federer
Max Mirnyi |
6–4, 3–6, [4–10] |
| Winner |
19. |
March 4, 2002 |
Dubai, UAE (1) |
Hard |
Daniel Nestor |
Joshua Eagle
Sandon Stolle |
3–6, 6–3, [13–11] |
| Runner-up |
15. |
March 11, 2002 |
Scottsdale, U.S. |
Hard |
Daniel Nestor |
Bob Bryan
Mike Bryan |
5–7, 6–7(6–8) |
| Winner |
20. |
March 18, 2002 |
Indian Wells, U.S. (2) |
Hard |
Daniel Nestor |
Roger Federer
Max Mirnyi |
6–4, 6–4 |
| Winner |
21. |
April 1, 2002 |
Miami, U.S. |
Hard |
Daniel Nestor |
Donald Johnson
Jared Palmer |
6–3, 3–6, 6–1 |
| Runner-up |
16. |
June 10, 2002 |
French Open, Paris |
Clay |
Daniel Nestor |
Paul Haarhuis
Yevgeny Kafelnikov |
5–7, 4–6 |
| Winner |
22. |
June 24, 2002 |
Nottingham, England |
Grass |
Mike Bryan |
Donald Johnson
Jared Palmer |
0–6, 7–6(7–3), 6–4 |
| Runner-up |
17. |
July 8, 2002 |
Wimbledon, London |
Grass |
Daniel Nestor |
Jonas Björkman
Todd Woodbridge |
1–6, 2–6, 7–6(9–7), 5–7 |
| Runner-up |
18. |
August 5, 2002 |
Toronto, Canada |
Hard |
Daniel Nestor |
Bob Bryan
Mike Bryan |
6–4, 6–7(1–7), 3–6 |
| Winner |
23. |
August 19, 2002 |
Indianapolis, U.S. (3) |
Hard |
Daniel Nestor |
Mahesh Bhupathi
Max Mirnyi |
7–6(7–4), 6–7(5–7), 6–4 |
| Runner-up |
19. |
October 14, 2002 |
Lyon, France |
Carpet |
Daniel Nestor |
Wayne Black
Kevin Ullyett |
4–6, 6–3, 6–7(3–7) |
| Winner |
24. |
October 21, 2002 |
Madrid, Spain (1) |
Hard (i) |
Daniel Nestor |
Mahesh Bhupathi
Max Mirnyi |
6–3, 7–5, 6–0 |
| Runner-up |
20. |
October 28, 2002 |
Basel, Switzerland |
Carpet |
Daniel Nestor |
Bob Bryan
Mike Bryan |
6–7(1–7), 5–7 |
| Runner-up |
21. |
January 6, 2003 |
Doha, Qatar |
Hard |
Daniel Nestor |
Martin Damm
Cyril Suk |
4–6, 6–7(8–10) |
| Runner-up |
22. |
January 27, 2003 |
Australian Open, Melbourne |
Hard |
Daniel Nestor |
Michaël Llodra
Fabrice Santoro |
4–6, 6–3, 3–6 |
| Winner |
25. |
February 24, 2003 |
Memphis, U.S. (2) |
Hard (i) |
Daniel Nestor |
Bob Bryan
Mike Bryan |
6–2, 7–6(7–3) |
| Winner |
26. |
March 3, 2003 |
Acapulco, Mexico |
Clay |
Daniel Nestor |
David Ferrer
Fernando Vicente |
6–3, 6–3 |
| Winner |
27. |
April 28, 2003 |
Houston, U.S. (1) |
Clay |
Daniel Nestor |
Jan-Michael Gambill
Graydon Oliver |
6–4, 6–3 |
| Winner |
28. |
May 19, 2003 |
Hamburg, Germany (2) |
Clay |
Daniel Nestor |
Mahesh Bhupathi
Max Mirnyi |
6–4, 7–6(12–10) |
| Winner |
29. |
June 16, 2003 |
London/Queen's Club, England (1) |
Grass |
Daniel Nestor |
Mahesh Bhupathi
Max Mirnyi |
5–7, 6–4, 7–6(7–3) |
| Winner |
30. |
October 27, 2003 |
Basel, Switzerland (1) |
Carpet (i) |
Daniel Nestor |
Lucas Arnold Ker
Mariano Hood |
6–4, 6–2 |
| Winner |
31. |
March 1, 2004 |
Marseille, France |
Hard (i) |
Daniel Nestor |
Martin Damm
Cyril Suk |
7–5, 6–3 |
| Winner |
32. |
May 3, 2004 |
Barcelona, Spain (1) |
Clay |
Daniel Nestor |
Mariano Hood
Sebastián Prieto |
4–6, 6–3, 6–4 |
| Runner-up |
23. |
June 14, 2004 |
London/Queen's Club, England |
Grass |
Daniel Nestor |
Bob Bryan
Mike Bryan |
4–6, 4–6 |
| Winner |
33. |
August 9, 2004 |
Cincinnati, U.S. (3) |
Hard |
Daniel Nestor |
Jonas Björkman
Todd Woodbridge |
6–2, 3–6, 6–3 |
| Winner |
34. |
September 13, 2004 |
US Open, New York |
Hard |
Daniel Nestor |
Leander Paes
David Rikl |
6–3, 6–3 |
| Winner |
35. |
October 25, 2004 |
Madrid, Spain (2) |
Hard (i) |
Daniel Nestor |
Bob Bryan
Mike Bryan |
6–3, 6–4 |
| Runner-up |
24. |
February 14, 2005 |
Marseille, France |
Hard (i) |
Daniel Nestor |
Martin Damm
Radek Štěpánek |
6–7(4–7), 6–7(5–7) |
| Winner |
36. |
March 21, 2005 |
Indian Wells, U.S. (3) |
Hard |
Daniel Nestor |
Wayne Arthurs
Paul Hanley |
7–6(8–6), 7–6(7–2) |
| Winner |
37. |
April 25, 2005 |
Houston, U.S. (2) |
Clay |
Daniel Nestor |
Martín García
Luis Horna |
6–3, 6–4 |
| Winner |
38. |
October 17, 2005 |
Vienna, Austria |
Hard (i) |
Daniel Nestor |
Jonathan Erlich
Andy Ram |
5–3, 5–4(5–2) |
| Winner |
39. |
October 24, 2005 |
Madrid, Spain (3) |
Hard (i) |
Daniel Nestor |
Leander Paes
Nenad Zimonjić |
3–6, 6–3, 6–2 |
| Runner-up |
25. |
November 7, 2005 |
Paris, France |
Carpet |
Daniel Nestor |
Bob Bryan
Mike Bryan |
4–6, 7–6(7–3), 4–6 |
| Winner |
40. |
February 6, 2006 |
Delray Beach, U.S. |
Hard |
Daniel Nestor |
Chris Haggard
Wesley Moodie |
6–2, 6–3 |
| Runner-up |
26. |
February 20, 2006 |
Marseille, France |
Hard (i) |
Daniel Nestor |
Martin Damm
Radek Štěpánek |
2–6, 7–6(7–4), [3–10] |
| Runner-up |
27. |
March 6, 2006 |
Dubai, UAE |
Hard |
Daniel Nestor |
Paul Hanley
Kevin Ullyett |
6–1, 2–6, [1–10] |
| Winner |
41. |
March 20, 2006 |
Indian Wells, U.S. (4) |
Hard |
Daniel Nestor |
Bob Bryan
Mike Bryan |
6–4, 6–4 |
| Winner |
42. |
May 1, 2006 |
Barcelona, Spain (2) |
Clay |
Daniel Nestor |
Mariusz Fyrstenberg
Marcin Matkowski |
6–2, 6–7(4–7), [10–5] |
| Winner |
43. |
May 15, 2006 |
Rome, Italy (2) |
Clay |
Daniel Nestor |
Jonathan Erlich
Andy Ram |
6–4, 5–7, [13–11] |
| Runner-up |
28. |
May 22, 2006 |
Hamburg, Germany |
Clay |
Daniel Nestor |
Paul Hanley
Kevin Ullyett |
2–6, 6–7(8–10) |
| Runner-up |
29. |
October 23, 2006 |
Madrid, Spain |
Hard (i) |
Daniel Nestor |
Bob Bryan
Mike Bryan |
5–7, 4–6 |
| Winner |
44. |
October 30, 2006 |
Basel, Switzerland (2) |
Carpet (i) |
Daniel Nestor |
Mariusz Fyrstenberg
Marcin Matkowski |
4–6, 6–4, [10–8] |
| Runner-up |
30. |
November 20, 2006 |
Tennis Masters Cup, Shanghai |
Hard (i) |
Daniel Nestor |
Jonas Björkman
Max Mirnyi |
2–6, 4–6 |
| Runner-up |
31. |
January 15, 2007 |
Sydney, Australia |
Hard |
Daniel Nestor |
Paul Hanley
Kevin Ullyett |
4–6, 7–6(7–3), [6–10] |
| Runner-up |
32. |
February 19, 2007 |
Marseille, France |
Hard (i) |
Daniel Nestor |
Arnaud Clément
Michaël Llodra |
5–7, 6–4, [8–10] |
| Runner-up |
33. |
April 16, 2007 |
Houston, U.S. |
Clay |
Daniel Nestor |
Bob Bryan
Mike Bryan |
6–7(3–7), 4–6 |
| Winner |
45. |
June 11, 2007 |
French Open, Paris |
Clay |
Daniel Nestor |
Lukáš Dlouhý
Pavel Vízner |
2–6, 6–3, 6–4 |
| Winner |
46. |
June 17, 2007 |
London/Queen's Club, England (2) |
Grass |
Daniel Nestor |
Bob Bryan
Mike Bryan |
7–6(7–4), 7–5 |
| Runner-up |
34. |
October 28, 2007 |
Basel, Switzerland |
Carpet |
James Blake |
Bob Bryan
Mike Bryan |
1–6, 1–6 |
| Winner |
47. |
November 18, 2007 |
Tennis Masters Cup, Shanghai |
Hard (i) |
Daniel Nestor |
Simon Aspelin
Julian Knowle |
6–2, 6–3 |
| Winner |
48. |
March 2, 2008 |
Memphis, U.S. (3) |
Hard (i) |
Mahesh Bhupathi |
Sanchai Ratiwatana
Sonchat Ratiwatana |
7–6(7–5), 6–2 |
| Winner |
49. |
March 8, 2008 |
Dubai, UAE (2) |
Hard |
Mahesh Bhupathi |
Martin Damm
Pavel Vízner |
7–5, 7–6(9–7) |
| Runner-up |
35. |
March 26, 2008 |
Miami, U.S. |
Hard |
Mahesh Bhupathi |
Bob Bryan
Mike Bryan |
2–6, 2–6 |
| Runner-up |
36. |
April 27, 2008 |
Monte Carlo, Monaco |
Clay |
Mahesh Bhupathi |
Rafael Nadal
Tommy Robredo |
3–6, 3–6 |
| Runner-up |
37. |
August 23, 2008 |
New Haven, U.S. |
Hard |
Mahesh Bhupathi |
Marcelo Melo
André Sá |
5–7, 2–6 |
| Runner-up |
38. |
October 6, 2008 |
Vienna, Austria |
Hard (i) |
Mahesh Bhupathi |
Max Mirnyi
Andy Ram |
1–6, 5–7 |
| Runner-up |
39. |
October 13, 2008 |
Madrid, Spain |
Hard (i) |
Mahesh Bhupathi |
Mariusz Fyrstenberg
Marcin Matkowski |
4–6, 2–6 |
| Winner |
50. |
October 18, 2008 |
Basel, Switzerland (3) |
Carpet |
Mahesh Bhupathi |
Christopher Kas
Philipp Kohlschreiber |
6–3, 6–3 |
| Runner-up |
40. |
January 31, 2009 |
Australian Open, Melbourne |
Hard |
Mahesh Bhupathi |
Bob Bryan
Mike Bryan |
6–2, 5–7, 0–6 |
| Winner |
51. |
February 22, 2009 |
Memphis, United States (4) |
Hard (i) |
Mardy Fish |
Travis Parrott
Filip Polášek |
7–6(9–7), 6–1 |
| Runner-up |
41. |
April 26, 2009 |
Barcelona, Spain |
Clay |
Mahesh Bhupathi |
Daniel Nestor
Nenad Zimonjić |
3–6, 6–7(9–11) |
| Winner |
52. |
August 16, 2009 |
Montréal, Canada (2) |
Hard |
Mahesh Bhupathi |
Max Mirnyi
Andy Ram |
6–4, 6–3 |
| Runner-up |
42. |
September 13, 2009 |
US Open, New York |
Hard |
Mahesh Bhupathi |
Lukáš Dlouhý
Leander Paes |
6–3, 3–6, 2–6 |
| Runner-up |
43. |
October 11, 2009 |
Beijing, China |
Hard |
Andy Roddick |
Bob Bryan
Mike Bryan |
4–6, 2–6 |
| Runner-up |
44. |
April 25, 2010 |
Barcelona, Spain |
Clay |
Lleyton Hewitt |
Daniel Nestor
Nenad Zimonjić |
6–4, 3–6, [6–10] |
| Winner |
53. |
August 8, 2010 |
Washington, United States |
Hard |
Mardy Fish |
Tomáš Berdych
Radek Štěpánek |
4–6, 7–6(9–7), [10–7] |
| Runner-up |
45. |
November 14, 2010 |
Paris, France |
Hard (i) |
Andy Ram |
Mahesh Bhupathi
Max Mirnyi |
5–7, 5–7 |
| Winner |
54. |
July 31, 2011 |
Los Angeles, United States |
Hard |
Xavier Malisse |
Somdev Devvarman
Treat Conrad Huey |
7–6(7–3), 7–6(12–10) |