Grégoire Jacq (born 9 November 1992) is a French tennis player.
He has a career high ATP doubles ranking of world No. 67 achieved on 16 September 2024. Jacq has won 10 ATP Challenger doubles titles. He also has a career high singles ranking of No. 332 achieved on 29 October 2018.
Following five doubles Challenger titles starting in June 2023 and another two in the first three months of 2024 (six of the total with Manuel Guinard),[2][3][4] he reached a career high doubles ranking of No. 97 on 6 May 2024. Next, the French duo Jacq/Guinard entered their home Slam, the 2024 French Open as alternates, and on their Major debut as a team, defeated 14th seeded American pair of Nathaniel Lammons and Jackson Withrow in the first round. They reached the third round with a win over Guido Andreozzi and Rinky Hijikata.[5] They lost to the Tsitsipas brothers.[6]
He reached his first ATP final with Guinard at the 2024 Swedish Open defeating defending champions and to seeded pair of Aleksandr Nedovyesov and Gonzalo Escobar.
The following week the pair reached their second ATP final at the 2024 Croatia Open Umag. As a result he reached the top 70 in the doubles rankings on 29 July 2024.