Thierry Ascione (born 17 January 1981) is an ATP tennis coach and a former professional player from France.

He reached a career-high singles ranking of World No.

He played Roger Federer in the second round of Roland Garros 2007, saving five match points in the third set and holding two set points before eventually losing in straight sets.

5 ATP player Jo-Wilfried Tsonga and former World No.7 Richard Gasquet.

[1] Since 2021 he coached Ugo Humbert (until 2022)[2] and also Lucas Pouille[3] (until 2024)[4].