Stadium: Court 7 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Monastir | 2021/09/22 08:00 | Lilian Marmousez v Daniil Glinka | 7-6,6-2 |
| ITF M15 Monastir | 2021/09/16 11:15 | Lilian Marmousez v Axel Garcian | 5-7,1-6 |
| ITF M15 Monastir | 2021/09/15 09:40 | Lilian Marmousez v Taisei Ichikawa | 4-6,6-4,6-1 |
| ITF M25 Montauban | 2021/06/23 10:05 | Antoine Escoffier v Lilian Marmousez | 7-6,7-5 |
| ITF M25 Grasse | 2021/06/15 08:00 | Lilian Marmousez v Bogdan Bobrov | 7-5,6-2 |
| ITF M15 Helsinki | 2021/06/06 06:00 | Lilian Marmousez v Kyrian Jacquet | 1-6,2-6 |
| ITF M15 Helsinki | 2021/06/05 07:00 | Lucas Catarina v Lilian Marmousez | 3-6,3-6 |
| ITF M15 Helsinki | 2021/06/04 07:00 | Lilian Marmousez v Bruno Kuzuhara | 6-4,7-6 |
| ITF M15 Monastir | 2021/09/22 10:35 | Michel-Alexandre Fortin v Takashi Saito | 1-6,4-6 |
| ITF M15 Ulcinj | 2021/09/14 09:55 | Samuel Vincent Ruggeri v Takashi Saito | 6-1,6-1 |
| ITF M15 Ulcinj | 2021/09/08 08:00 | Marat Deviatiarov v Takashi Saito | 6-3,6-4 |
| ITF M15 Monastir | 2021/06/28 08:00 | Takashi Saito v Valentino De Pellegrin | 6-3,2-6,10-12 |
| ITF M15 Monastir | 2021/06/21 12:30 | Takashi Saito v Jake Van Emburgh | 6-2,3-6,8-10 |
| ITF M15 Monastir | 2021/06/21 08:00 | Takashi Saito v Youcef Rihane | 5-7,6-4,10-3 |
| ITF M15 Monastir | 2021/06/20 08:00 | Takashi Saito v Berk Ilkel | 6-2,6-3 |
| ITF M15 Monastir | 2021/05/06 08:25 | Takashi Saito v Alexander Donski | 6-7,1-6 |