Challenger - Prague | 05/06 11:35 | 25 | [241] Gijs Brouwer v Gauthier Onclin [282] | 2-6,2-6 | |
Challenger - Ostrava | 04/24 08:00 | 26 | [205] Dennis Novak v Gauthier Onclin [276] | 7-6,6-2 | |
Challenger - Ostrava | 04/23 09:45 | 25 | [265] Dimitar Kuzmanov v Gauthier Onclin [276] | 5-7,6-7 | |
Challenger - Oeiras | 04/16 11:45 | 25 | [158] Jesper De Jong v Gauthier Onclin [269] | 6-3,6-2 | |
Challenger - Oeiras | 04/15 09:30 | 19 | [245] Maks Kasnikowski v Gauthier Onclin [269] | 6-7,3-6 | |
Challenger - Oeiras | 04/14 11:50 | 14 | [451] Miguel Damas v Gauthier Onclin [268] | 4-6,1-6 | |
ITF - M25 Saint-Dizier | 03/31 13:00 | 29 | [262] Alibek Kachmazov v Gauthier Onclin [279] | 6-3,6-7,5-7 | |
ITF - M25 Saint-Dizier | 03/30 15:10 | 28 | Buvaysar Gadamauri v Gauthier Onclin | 4-6,1-6 | |
ITF - M25 Saint-Dizier | 03/29 14:00 | 27 | [423] Sascha Gueymard Wayenburg v Gauthier Onclin [279] | 6-3,3-6,2-6 | |
ITF - M25 Saint-Dizier | 03/28 16:35 | 26 | Boris Fassbender v Gauthier Onclin | 3-6,3-6 | |
ITF - M25 Saint-Dizier | 03/27 10:25 | 25 | Adan Freire Da Silva v Gauthier Onclin | 3-6,1-6 | |
ITF - M25 Toulouse | 03/22 14:10 | 27 | [279] Gauthier Onclin v Raphael Collignon [436] | 4-6,5-7 | |
ITF - M25 Toulouse | 03/21 15:40 | 26 | Gauthier Onclin v Alexey Vatutin | 6-3,4-6,6-2 | |
ITF - M25 Toulouse | 03/20 15:30 | 25 | [279] Gauthier Onclin v Antoine Hoang [495] | 6-1,6-2 | |
ITF - M25 Creteil | 03/15 10:55 | 27 | Alexey Vatutin v Gauthier Onclin | 6-3,6-1 | |
ITF - M25 Creteil | 03/14 10:00 | 26 | [169] Neil Oberleitner v Gauthier Onclin [264] | 4-6,6-2,2-6 | |
ITF - M25 Creteil | 03/12 18:05 | 25 | Adrien Gobat v Gauthier Onclin | 4-6,6-1,4-6 | |
Challenger - New Delhi | 02/27 14:15 | 25 | [267] Gauthier Onclin v Adam Walton [145] | 4-6,0-6 | |
Challenger - Pune | 02/19 13:00 | 25 | [235] Tung-Lin Wu v Gauthier Onclin [252] | 7-6,6-7,6-3 | |
Challenger - Bengaluru | 02/15 06:30 | 26 | [153] Adam Walton v Gauthier Onclin [252] | 6-2,6-2 | |
Challenger - Bengaluru | 02/12 10:30 | 25 | [277] Giovanni Fonio v Gauthier Onclin [252] | 4-6,6-1,6-7 | |
Challenger - Ottignies | 01/25 15:30 | 26 | [250] Leandro Riedi v Gauthier Onclin [218] | 7-5,6-3 | |
Challenger - Ottignies | 01/24 16:10 | 25 | [184] Denis Yevseyev v Gauthier Onclin [218] | 4-6,4-6 | |
Challenger Nonthaburi | 01/18 05:55 | 26 | [218] Gauthier Onclin v Matteo Gigante [171] | 2-6,7-6,2-6 | |
Challenger Nonthaburi | 01/16 07:00 | 25 | [218] Gauthier Onclin v Clement Tabur [233] | 6-4,6-3 | |
Open d'Australie | 01/10 05:15 | 14 | [103] Aleksandar Kovacevic v Gauthier Onclin [220] | 6-3,6-7,7-6 | |
Challenger Nonthaburi | 01/04 03:30 | 27 | [231] Gauthier Onclin v Lucas Pouille [329] | 3-6,2-6 | |
Challenger Nonthaburi | 01/03 03:00 | 26 | [251] Evgeny Donskoy v Gauthier Onclin [231] | 3-6,3-6 | |
Challenger Nonthaburi | 01/01 08:45 | 25 | [231] Gauthier Onclin v Yasutaka Uchiyama [269] | 7-5,6-2 | |
Challenger Danderyd | 11/16 09:00 | 26 | Gauthier Onclin v Flavio Cobolli | Walkover |
Gauthier Onclin (born 26 February 2001) is a Belgian tennis player. He has a career high ranking of 184 achieved on September 18, 2023.
In January 2023 Onclin reached the semifinals of the 2023 BW Open in Mons where he lost to eventual champion and compatriot David Goffin. In May 2023 he beat the higher-ranked Elias Ymer at a challenger event in Bordeaux. At the 2023 French Open he defeated Nicholas David Ionel in straight sets in the first round of qualifying before losing to Argentine Thiago Agustin Tirante in three sets. Onclin got his revenge over the Argentine in the qualifying at the 2023 Wimbledon Championships, winning in straight sets during his first ever grass-court summer, as his junior years coincided with the grass-court cancellation due to the COVID-19 pandemic.
In October 2023, he received a wildcard in doubles for the European Open in Antwerp, alongside compatriot Michael Geerts. At the same tournament, in the qualifying singles competition, he defeated higher-ranked American Maxime Cressy.