Nicolas Pierre Armand Mahut (French pronunciation: ?[nik?l? pj?? a?m?~ may]; born 21 January 1982) is a French professional tennis player.
In singles, he reached a career-high Association of Tennis Professionals (ATP) ranking of world No.
37 on 5 May 2014.
In doubles, he reached a career-high ATP ranking of world No.
1 on 6 June 2016.
Mahut is well known for being skilled on grass, on which he has won the fourth-most titles amongst active players in singles behind Roger Federer (19) and Andy Murray (8) and Novak Djokovic (5) and tying with Rafael Nadal (4) ; he also has the 2nd most singles titles on grass won over the age of 30 amongst active players, behind Federer (5).
He is a distinguished doubles player, having completed the Career Grand Slam at the 2019 Australian Open, following victories at the 2015 US Open, 2016 Wimbledon Championships and 2018 French Open partnering Pierre-Hugues Herbert.
Mahut was a part of the longest match in professional tennis history against John Isner in the first round of the 2010 Wimbledon Championships.