Stadium: Centre court Round: 27 Ground: Hardcourt indoor
| 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 Plaisir | 2021/09/16 07:50 | Yannick Mertens v Tristan Schoolkate | 4-6,6-7 |
| ITF - M25 Rodez | 2021/10/14 11:50 | Tristan Schoolkate v Martin Damm | 2-6,6-7 |
| ITF - M25 Rodez | 2021/10/12 07:55 | Martin Damm v Harold Mayot | 7-6,3-6,6-3 |
| ITF - M25 Nevers | 2021/10/07 16:50 | Alexey Vatutin v Martin Damm | 6-2,6-2 |
| ITF - M25 Nevers | 2021/10/05 08:00 | Millen Hurrion v Martin Damm | 5-7,6-7 |
| ITF - M15 Fayetteville | 2021/09/22 18:35 | Finn Bass v Martin Damm | 3-6,6-3,7-5 |
| ITF - M15 Champaign | 2021/09/19 15:00 | Gabi Adrian Boitan v Martin Damm | 3-6,6-3,2-6 |
| ITF - M15 Champaign | 2021/09/18 15:00 | John McNally v Martin Damm | 7-6,6-7,3-6 |
| ITF - M15 Champaign | 2021/09/17 15:00 | Nathan Ponwith v Martin Damm | 6-7,4-6 |