Thomas Mario "Tommy" Haas (born April 3, 1978) is a German professional tennis player who reached a career-high ranking of World No.2 on May 13, 2002. Since 2010 he additionally holds US American citizenship.
Tommy is an all-court all-around player with a very versatile style. He has solid groundstrokes off both sides and is also a steady volleyer with the ability to transition to the net easily. Unlike many top pro's, he doesn't specialize in any particular playing style but rather adapts his game to counter his opponent's style or the court surface. Tommy's best weapon is his powerful single-handed backhand which is among the best in the game. His forehand is also a major weapon. His serve is considered average and his weakness as a player has more to do with inconsistency and mental stability rather than anything technical. Often Tommy's biggest enemy in a match is himself whenever he loses control of his temper.
His equipment include K-Swiss and Nike for his clothes and shoes, respectively. He switched to using Head racquets in 2009 after using Dunlop Sport racquets for most of his career.