Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Rodez | 2021/10/15 09:55 | Yannick Mertens v Martin Damm | 3-6,2-6 |
| ITF M25 Rodez | 2021/10/14 07:55 | Jelle Sels v Yannick Mertens | 4-6,6-3,6-7 |
| ITF M25 Rodez | 2021/10/13 09:25 | Blake Ellis v Yannick Mertens | 4-6,7-6,1-6 |
| ITF M25 Nevers | 2021/10/08 13:55 | Alexey Vatutin v Yannick Mertens | 6-3,6-2 |
| ITF M25 Nevers | 2021/10/07 10:55 | Dane Sweeny v Yannick Mertens | 4-6,6-1,3-6 |
| Challenger Orleans | 2021/09/26 14:15 | Yannick Mertens v Matteo Viola | 1-6,4-6 |
| Challenger Biel | 2021/09/20 10:30 | Alexander Ritschard v Yannick Mertens | 6-2,6-1 |
| Challenger Biel | 2021/09/19 09:30 | Yannick Mertens v Elmar Ejupovic | 6-3,7-6 |
| ITF M25 Monastir | 2022/01/24 12:00 | Colin Sinclair v Bharath Nishok Kumaran | 6-3,6-4 |
| ITF M25 Monastir | 2022/01/23 14:00 | Colin Sinclair v Jannik Maute | 6-3,6-1 |
| ITF M15 Santo Domingo | 2021/12/09 15:25 | Colin Sinclair v Peter Bertran | 2-6,2-6 |
| ITF M15 Santo Domingo | 2021/12/08 18:05 | Colin Sinclair v Sebastian Gima | 6-3,6-2 |
| ITF M15 Guatemala | 2021/11/28 15:30 | Marco Brugnerotto v Colin Sinclair | 1-6,7-5,4-6 |
| ITF M15 Guatemala | 2021/11/27 17:35 | Colin Sinclair v Taha Baadi | 7-6,7-6 |
| ITF M15 Guatemala | 2021/11/26 15:30 | Alejandro Mendoza v Colin Sinclair | 3-6,7-6,2-6 |
| ITF M15 Guatemala | 2021/11/25 15:30 | Osgar O'Hoisin v Colin Sinclair | 2-6,3-6 |