Sebastian Fitz (born 12 August 1979) is a German former professional tennis player.

[1] A left-handed player, Fitz reached a career high singles ranking of 257 in the world.

His only ATP Tour singles main draw appearance came as a lucky loser at the 2004 Nottingham Open, where he was beaten in the first round by Victor Hănescu in three sets.

[2] He made the second qualifying round of the 2005 Australian Open.

[3] Fitz has a younger sister, Christina, who also competed on the professional tennis tour.