Stadium: Court 2 Round: 25 Ground: Clay
| ITF M15 Monastir | 2021/03/11 08:30 | Yannick Mertens v Naoki Nakagawa | 6-4,3-6,4-6 |
| ITF M15 Monastir | 2021/03/10 10:30 | Yannick Mertens v Constantin Schmitz | 6-0,6-2 |
| ITF M15 Monastir | 2021/02/13 08:30 | Yannick Mertens v Gauthier Onclin | 6-3,1-6,2-6 |
| ITF M15 Monastir | 2021/02/12 10:05 | Yannick Mertens v Juan Bautista Torres | 6-2,6-3 |
| ITF M15 Monastir | 2021/02/11 08:25 | Yannick Mertens v Lukas Mugevicius | 6-1,6-1 |
| ITF M15 Monastir | 2021/02/10 08:30 | Yannick Mertens v Stuart Parker | 5-7,6-4,6-3 |
| ITF M15 Monastir | 2021/02/07 08:30 | Yannick Mertens v Stuart Parker | 3-6,6-4,6-7 |
| ITF M15 Monastir | 2021/02/06 08:30 | Yannick Mertens v Tom Kocevar-Desman | 6-3,6-2 |
| ITF M15 Antalya | 2021/03/17 10:00 | Alexander Cozbinov v Jeroen Vanneste | 6-0,6-3 |
| ITF M15 Antalya | 2021/03/11 06:55 | Jeroen Vanneste v Vladimir Korolev | 3-6,3-6 |
| ITF M15 Antalya | 2021/03/10 13:35 | Jeroen Vanneste v Mikolaj Lorens | 7-6,6-3 |
| ITF M15 Antalya | 2021/03/03 09:45 | Radu Mihai Papoe v Jeroen Vanneste | 3-6,6-2,6-3 |
| ITF M15 Antalya | 2021/02/09 13:15 | Jeroen Vanneste v Jacopo Berrettini | 7-6,3-6,3-6 |
| ITF M15 Antalya | 2021/02/09 12:40 | Jeroen Vanneste v Jacopo Berrettini | 7-6,3-6,3-6 |
| ITF M15 Antalya | 2021/02/04 06:30 | Jeroen Vanneste v Vlad Andrei Dancu | 3-6,4-6 |
| ITF M15 Manacor | 2021/01/12 12:30 | Jeroen Vanneste v Holger Rune | 1-6,0-6 |