Gaël Sébastien Monfils is a French professional tennis player. He has been ranked world No. 6, by the ATP, achieved in November 2016. Monfils has won 13 ATP Tour singles titles, out of 35 finals contested. His best results at the Majors are three semifinals, at the 2008 French Open and the 2016 US Open in singles, and at the 2026 US Open in mixed doubles.