Stadium: Court 2 Round: 54 Ground: Hardcourt indoor
| ITF M15 Forbach | 2021/09/26 12:00 | Yann Marti v Clavel, Tom | 6-1,6-3 |
| ITF M25 Eupen | 2021/09/06 11:30 | Clavel, Tom v Oumaouche, Rayane | 2-6,2-6 |
| ITF M25 Eupen | 2021/09/05 10:30 | Clavel, Tom v Martin Benes | 6-7,7-6,10-7 |
| ITF M15 Huy | 2021/08/22 17:10 | Clavel, Tom v Maikel De Boes | 7-6,4-6,8-10 |
| ITF M25 Koksijde | 2021/08/16 09:40 | Cloes, Loic v Clavel, Tom | 6-4,6-4 |
| ITF M25 Koksijde | 2021/08/15 11:40 | Melzer, Lennart v Clavel, Tom | 3-6,6-4,8-10 |
| ITF M25 The Hague | 2021/06/27 08:00 | Clavel, Tom v Michiel de Krom | 3-6,5-7 |
| ITF M15 Troisdorf | 2021/05/09 10:00 | Clavel, Tom v Timo Stodder | 1-6,1-6 |
| ITF M25 Prague | 2021/10/03 10:00 | Paulovcak, Samuel v Terczynski, Mateusz | 4-6,6-3,10-8 |
| Polish National Tour | 2021/07/13 11:50 | Terczynski, Mateusz v Daniel Michalski | 2-6,1-6 |
| ITF M15 Poprad | 2021/07/05 08:00 | Illya Beloborodko v Terczynski, Mateusz | 6-4,6-2 |
| ITF M15 Poprad | 2021/07/04 11:00 | Jakub Kroslak v Terczynski, Mateusz | 6-2,6-7,9-11 |
| ITF M25 Wroclaw | 2021/06/29 08:00 | Szymon Kielan v Terczynski, Mateusz | 6-3,6-2 |
| ITF M25 Wroclaw | 2021/06/28 11:00 | Terczynski, Mateusz v Lukas Palovic | 6-3,6-1 |
| ITF M25 Wroclaw | 2021/06/27 14:00 | Langmajer, Dominik v Terczynski, Mateusz | 1-6,3-6 |
| ITF M25 Poznan | 2020/08/23 11:00 | Lahky, Nikolas v Terczynski, Mateusz | 6-4,2-6,10-6 |