|Country (sports)||United States|
|Residence||Alpharetta, Georgia, United States|
|Born||August 10, 1970|
St. Louis, Missouri, U.S.
|Height||1.83 m (6 ft 0 in)|
|Highest ranking||108 (March 21, 1994)|
|Grand Slam singles results|
|Highest ranking||73 (June 6, 1994)|
Doug Flach (born August 10, 1970) is a former tennis player from the United States.
Flach won two doubles titles during his career. The right-hander reached his highest individual ranking on the ATP Tour on March 21, 1994, when he reached World No. 108. He defeated Andre Agassi (seeded third) in the first round at Wimbledon in 1996 but lost in the third round. He also defeated Agassi in 1997 at Washington, D.C.
Additionally, Flach had career wins over Ivan Lendl, Pat Rafter, Gustavo Kuerten, and Thomas Johansson. Flach won two doubles titles: one with Paul Annacone and the other with Sandon Stolle. He retired in 1999.
|Loss||0-1||Aug 1991||Long Island||Hard||Diego Nargiso|| Eric Jelen
|6-0, 4-6, 6-7|
|Loss||0-2||May 1993||Coral Springs, U.S.||Clay||Paul Annacone|| Patrick McEnroe
|Win||1-2||Oct 1993||Beijing, China||Carpet (i)||Paul Annacone|| Jacco Eltingh
|Loss||1-3||Jul 1996||Washington, U.S.||Hard||Chris Woodruff|| Grant Connell
|6-7, 6-3, 3-6|
|Win||2-3||Jul 1998||Newport, US||Grass||Sandon Stolle|| Scott Draper
|6-2, 4-6, 7-6|
|Loss||2-4||May 1999||Delray Beach, U.S.||Clay||Brian MacPhie|| Max Mirnyi
|6-7(3-7), 6-3, 3-6|