| Australian Open | 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 | |
| Challenger Danderyd | 11/14 17:15 | 25 | [380] Leo Borg v Gauthier Onclin [227] | 6-2,4-6,0-6 | |
| Challenger Helsinki | 11/06 13:35 | 19 | [228] Gauthier Onclin v Maximilian Neuchrist [258] | 5-7,4-6 | |
| Challenger Helsinki | 11/05 10:30 | 14 | Gauthier Onclin v Markus Molder | 6-0,6-4 | |
| Challenger Bergamo | 10/31 09:00 | 25 | [216] Gauthier Onclin v Radu Albot [132] | 7-6,0-6,0-6 | |
| Challenger Ortisei | 10/23 15:25 | 25 | [310] Maks Kasnikowski v Gauthier Onclin [216] | 6-1,6-4 | |
| ATP Antwerp | 10/16 09:30 | 19 | [214] Gauthier Onclin v Giovanni M Perricard [226] | 4-6,2-6 | |
| ATP Antwerp | 10/15 11:30 | 14 | [112] Maxime Cressy v Gauthier Onclin [206] | 2-6,6-1,6-7 | |
| Challenger Rennes | 09/13 16:30 | 26 | [195] Gauthier Onclin v Benjamin Bonzi [102] | 1-6,2-6 | |
| Challenger Rennes | 09/11 15:00 | 25 | [195] Gauthier Onclin v Giulio Zeppieri [136] | 6-2,6-2 | |
| Challenger Istanbul | 09/05 10:40 | 25 | [264] Altug Celikbilek v Gauthier Onclin [198] | 6-1,6-0 | |
| US Open | 08/25 18:30 | 15 | [205] Gauthier Onclin v Sho Shimabukuro [159] | 4-6,6-7 | |
| US Open | 08/23 18:05 | 14 | [205] Gauthier Onclin v Marco Trungelliti [228] | 6-3,6-4 | |
| Challenger Meerbusch | 08/10 15:30 | 26 | [203] Gauthier Onclin v Max Hans Rehberg [413] | 6-7,6-7 | |
| Challenger Meerbusch | 08/08 13:05 | 25 | [203] Gauthier Onclin v Gerard Campana Lee [419] | 2-6,7-5,6-1 | |
| Challenger Luedenscheid | 08/04 12:00 | 27 | [208] Gauthier Onclin v Benoit Paire [126] | 4-6,4-6 | |
| Challenger Luedenscheid | 08/03 14:00 | 26 | [208] Gauthier Onclin v Santiago Rodriguez Taverna [272] | 6-1,6-4 | |
| Challenger Luedenscheid | 08/01 15:40 | 25 | [148] Jan Choinski v Gauthier Onclin [208] | 4-6,2-6 | |
| Challenger Amersfoort | 07/21 09:00 | 27 | [215] Gauthier Onclin v Rudolf Molleker [264] | 2-6,2-6 | |
| Challenger Amersfoort | 07/19 12:40 | 26 | Guy Den Ouden v Gauthier Onclin | 6-7,6-7 | |
| Challenger Amersfoort | 07/18 08:30 | 25 | [215] Gauthier Onclin v Oriol Roca Batalla [290] | 6-2,6-2 | |
| Challenger Iasi | 07/11 07:30 | 25 | Pablo Cuevas v Gauthier Onclin | 6-2,6-3 | |
| Challenger Milan | 07/07 10:00 | 27 | [115] Facundo D Acosta v Gauthier Onclin [216] | 6-4,6-3 | |
| Challenger Milan | 07/05 08:30 | 26 | [216] Gauthier Onclin v Alessandro Giannessi [241] | 6-4,6-1 | |
| Challenger Milan | 07/03 15:30 | 25 | [230] Edoardo Lavagno v Gauthier Onclin [216] | 6-1,3-6,4-6 | |
| Wimbledon | 06/28 10:00 | 15 | [169] Maximilian Marterer v Gauthier Onclin [214] | 6-2,6-2 |
Wikipedia - Gauthier Onclin
Gauthier Onclin (born 26 February 2001) is a Belgian tennis player. He has a career high ranking of 184 achieved on September 18, 2023.
History
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.