Gabriel Debru (born 21 December 2005) is a French tennis player. He has a career high ATP singles ranking of world No. 264 achieved on 28 October 2024 and a doubles ranking of No. 280 achieved on 21 October 2024.[2]
In 2022, Debru won the French Open's boys single title.[3] Later that year, he reached the finals of the Wimbledon's boys doubles title, playing along with Paul Inchauspé.
In July, Debru won his maiden Challenger title in Troyes, defeating third seed Timofey Skatov in the final. At 18 years and 6 months, he became the youngest French player to win a Challenger title since 2017. The only French players to win at a younger age were Richard Gasquet, Fabrice Santoro, Gael Monfils and Corentin Moutet. João Fonseca, Joel Schwärzler, Debru and Learner Tien became the youngest champions of 2024 at that level.[4][5]
In August, Debru won his second Challenger singles title in Como, defeating Ignacio Buse in the final.[6] He became the third-youngest Frenchman to win multiple Challenger trophies (since 1978), joining former Top 10 players Richard Gasquet and Gael Monfils.[7]
(W) winner; (F) finalist; (SF) semifinalist; (QF) quarterfinalist; (#R) rounds 4, 3, 2, 1; (RR) round-robin stage; (Q#) qualification round; (P#) preliminary round; (DNQ) did not qualify; (A) absent; (Z#) Davis/Fed Cup Zonal Group (with number indication) or (PO) play-off; (G) gold, (S) silver or (B) bronze Olympic/Paralympic medal; (NMS) not a Masters tournament; (NTI) not a Tier I tournament; (P) postponed; (NH) not held; (SR) strike rate (events won / competed); (W–L) win–loss record.
To avoid confusion and double counting, these charts are updated at the conclusion of a tournament or when the player's participation has ended.
France
Rudolf Molleker 
Timofey Skatov 
Ignacio Buse 
Matěj Vocel
Jakub Paul 
Federico Arnaboldi 
Edas Butvilas 
Mateo del Pino
Gilles-Arnaud Bailly 
Sebastian Gorzny