| Challenger Ottignies | 01/24 12:15 | 19 |
[381] Ergi Kirkin
v
Gauthier Onclin [338] 
|
1-6,6-7 | |
| Challenger Ottignies | 01/23 19:00 | 14 |
Sumit Nagal
v
Gauthier Onclin
|
2-6,6-2,5-7 | |
| ITF M15 Bressuire | 01/22 14:30 | 29 |
Gauthier Onclin v
Lucas Poullain
|
7-5,6-3 | |
| ITF M15 Bressuire | 01/21 16:15 | 28 |
Gauthier Onclin v
Antoine Ghibaudo
|
6-2,6-2 | |
| ITF M15 Bressuire | 01/20 14:25 | 27 |
Gauthier Onclin v
Adrien Gobat
|
7-6,6-1 | |
| ITF M15 Bressuire | 01/19 13:00 | 26 |
Gauthier Onclin v
Philip Florig
|
6-3,6-2 | |
| ITF M15 Bressuire | 01/18 09:00 | 25 |
Gauthier Onclin v
Maik Steiner
|
7-5,7-5 | |
| Challenger Maia | 11/29 12:30 | 25 |
[339] Gauthier Onclin v
Evgeny Karlovskiy
[331] |
2-6,0-6 | |
| Challenger Maia | 11/28 13:10 | 19 |
[339] Gauthier Onclin v
Jaime Faria
[364] 
|
6-0,2-6,6-2 | |
| Challenger Maia | 11/27 14:10 | 14 |
Gauthier Onclin v
Francisco Rocha
|
6-0,6-3 | |
| Challenger Helsinki | 11/13 09:00 | 14 |
[47] Alexander Erler
v
Gauthier Onclin [331]
|
7-6,7-6 | |
| ITF M25 Monastir | 11/04 11:10 | 27 |
[338] Gauthier Onclin v
Jurgen Briand
[410] |
7-6,0-6,2-6 | |
| ITF M25 Monastir | 11/03 12:10 | 26 |
Gauthier Onclin v
Adria S Barrera
|
6-4,6-1 | |
| ITF M25 Monastir | 11/02 11:40 | 25 |
Gauthier Onclin v
Jules Marie
|
3-6,6-3,6-4 | |
| ITF M25 Monastir | 10/30 11:25 | 29 |
[342] Gauthier Onclin v
Mathys Erhard
[403] |
6-7,6-7 | |
| ITF M25 Monastir | 10/29 09:30 | 28 |
[342] Gauthier Onclin v
Ugo Blanchet
[340] 
|
6-4,6-2 | |
| ITF M25 Monastir | 10/28 09:30 | 27 |
[249] Skander Mansouri
v
Gauthier Onclin [342]
|
7-5,1-6,5-7 | |
| ITF M25 Monastir | 10/27 09:40 | 26 |
[485] Eliakim Coulibaly
v
Gauthier Onclin [342]
|
4-6,2-6 | |
| ITF M25 Monastir | 10/25 09:50 | 25 |
Andrej Krajcik
v
Gauthier Onclin
|
1-6,1-6 | |
| ITF M25 Rodez | 10/15 13:30 | 28 |
Gauthier Onclin v
Alexis Gautier
|
2-6,4-6 | |
| ITF M25 Rodez | 10/14 09:30 | 27 |
[437] Sascha Gueymard Wayenburg
v
Gauthier Onclin [401]
|
3-6,3-6 | |
| ITF M25 Rodez | 10/13 09:20 | 26 |
Gregoire Jacq
v
Gauthier Onclin
|
Retired | |
| ITF M25 Rodez | 10/12 07:30 | 25 |
Nazim Makhlouf
v
Gauthier Onclin
|
4-6,6-7 | |
| ITF M25 Nevers | 10/09 12:30 | 29 |
[322] Raphael Collignon
v
Gauthier Onclin [396]
|
3-6,6-2,3-6 | |
| ITF M25 Nevers | 10/08 12:00 | 28 |
[429] Sascha Gueymard Wayenburg
v
Gauthier Onclin [396]
|
3-6,4-6 | |
| ITF M25 Nevers | 10/07 09:55 | 27 |
Arthur Reymond
v
Gauthier Onclin
|
4-6,2-6 | |
| ITF M25 Nevers | 10/06 15:05 | 26 |
Simon Reveniau
v
Gauthier Onclin
|
2-6,2-6 | |
| ITF M25 Nevers | 10/04 12:55 | 25 |
Hugo Pontico
v
Gauthier Onclin
|
2-6,4-6 | |
| ITF M15 Zlatibor | 09/18 09:00 | 29 |
Gauthier Onclin v
Ilya Snitari
|
6-1,6-4 | |
| ITF M15 Zlatibor | 09/17 08:00 | 28 |
Gauthier Onclin v
Stefan Popovic
|
6-2,6-2 |
Wikipedia - Gauthier Onclin
Gauthier Onclin (born 26 February 2001) is a Belgian tennis player who plays mainly on the ATP Challenger Tour. He has a career high ranking of world No. 194 achieved on 18 September 2023.
History
2023: ATP debut in doubles
In January, Onclin reached the semifinals of the 2023 BW Open in Ottignies-Louvain-la-Neuve where he lost to eventual champion and compatriot David Goffin.
In May, he defeated the higher-ranked Elias Ymer at a Challenger event in Bordeaux in the first round. 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 portion of the Tour cancellation due to the COVID-19 pandemic.
In October, 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.
2024: Maiden Challenger final
In May, Onclin reached his first Challenger final at the Prague Open. He lost to the former world No. 35 Jiří Veselý.