David Martin had an outstanding junior career.  Some of his highlights include:  ranked #1 Nationally in Boy's 14 Singles and #1 Nationally in Boy's 14 Doubles with Brian Barki in 1994;  ranked #3 Nationally in Boy's 16 Singles in 1996;  and ranked #2 Nationally in Boy's 18 Singles.  He won the U.S. Open Boy's Doubles in 1998.

At Stanford University, Martin contributed to their NCAA Team Championship in 2000 as a freshman, earned NCAA Singles semi-final honors in 2002, and advanced to the NCAA Doubles final in 2002.  During his college career, he earned five All-American Honors (Doubles in 2001, 2002, and 2003; Singles in 2002 and 2003).  He won the Intercollegiate Tennis Association "Senior Player of the Year" award in 2003.  He also earned the Jake Gimbel Award for "Stanford Athlete with the Best Competitive Attitude" in 2003.  He served as Co-Captain at Stanford in 2002 and Captain in 2003.

Martin collected 16 Challenger Circuit Doubles titles, 23 Futures Circuit Doubles titles, and holds the most all-time USTA Pro Circuit Men's Doubles team titles with Scott Lipsky.  He advanced to 4 Futures Circuit Singles finals.

In 2008, Martin won the ATP SAP Open (San Jose, CA) Men's Doubles title, defeating perennial World #1 ranked Bob and Mike Bryan in the finals.  He advanced to 5 ATP Tour Doubles finals:  Chennai (2011); Munich, Indianapolis, and Bangkok (2008); and Los Angeles (2007).  He was twice selected as a practice partner for the United States Davis Cup team in 2008 (Winston-Salem and Madrid).

He competed on the ATP World Tour from 2003-2011 where he achieved a career-high World Doubles ranking of #38 in 2008.  He reached the Round of 16 at Wimbledon in Men's Doubles in 2007 and competed in 13 Grand Slam tournaments:  U.S. Open (5); Wimbledon (4); French Open (2); and the Australian Open (2).  Martin was elected by his fellow players to serve on the 10-person ATP Player Council representing player interests.