Nicolas Thomann (; born 29 November 1972) is a former professional tennis player from France.ITF Tennis Profile
Career Thomann was a quarter-finalist in the 2000 Davidoff Swiss Indoors, beating top 50 players Nicolas Escudé and Nicolás Lapentti en route.ATP World Tour Profile His best win however came in Atlanta the following year, where he had a straight sets upset win over Andre Agassi in the opening round, playing as a qualifier. The American had gone into the tournament having won his previous two tournaments, both ATP Masters Series events.BBC Sport, "Agassi suffers shock defeat", 25 April 2001
In the 2001 French Open he competed in both the singles and men's doubles. He lost his singles match in five sets to Jan Frode Andersen and also exited in the first round of the doubles, partnering Jérôme Golmard.
The Frenchman lost to Thomas Enqvist in the opening round of 2002 Australian Open but reached the second round in the 2002 Wimbledon Championships, with a win against Markus Hipfl, won 11–9 in the fifth set. He was then eliminated by Yevgeny Kafelnikov.
He reached the semi-finals at the 2003 RCA Championships, held in Indianapolis and also made the quarter-finals of the Thailand Open that year.
Challenger titles Singles: (2) No.YearTournamentSurfaceOpponentScore1. 2000Geneva, SwitzerlandClay Álex Calatrava6–4, 6–7(2), 6–12. 2002Oberstaufen, GermanyClay Tomáš Zíb7–6(6), 6–4
Doubles: (1) No.YearTournamentSurfacePartnerOpponentsScore1.2005Andrezieux, FranceHard Alexander Waske Robert Lindstedt Jean-Claude Scherrer7–6(2), 7–6(4)
References