Sebastian Fanselow (born 30 December 1991) is a German tennis player.

He has a career high ATP singles ranking of world No.

273, achieved on 8 August 2022, and a doubles ranking of No.

[1] He made his ATP main draw debut at the 2024 Lyon Open after entering the singles main draw as a lucky loser, losing to Yoshihito Nishioka in the first round.

This biographical article relating to German tennis is a stub.