Stadium: Court 4 Round: 27 Ground: Hardcourt outdoor
| ITF M15 Monastir | 2021/09/22 08:00 | Guy Den Ouden v Ryota Tanuma | 6-7,2-6 |
| ITF M15 Monastir | 2021/09/30 08:00 | Ryota Tanuma v Matas Vasiliauskas | 6-3,6-2 |
| ITF M15 Monastir | 2021/09/29 08:00 | Ryota Tanuma v Daniil Glinka | 6-4,6-3 |
| ITF M15 Monastir | 2021/09/26 08:30 | Li Tu v Ryota Tanuma | 3-6,6-1,6-2 |
| ITF M15 Monastir | 2021/09/25 08:30 | Omar Brigida v Ryota Tanuma | 3-6,4-6 |
| ITF M15 Monastir | 2021/09/24 07:55 | Lilian Marmousez v Ryota Tanuma | 4-6,6-7 |
| ITF M15 Monastir | 2021/09/23 13:00 | Axel Garcian v Ryota Tanuma | 3-6,0-6 |
| ITF M15 Monastir | 2021/09/22 08:00 | Guy Den Ouden v Ryota Tanuma | 6-7,2-6 |
| ITF M15 Monastir | 2021/09/18 08:30 | Gabriel Decamps v Ryota Tanuma | 7-6,6-3 |
| ITF M15 Monastir | 2021/09/30 08:00 | Guy Den Ouden v Lukas Neumayer | 7-6,6-3 |
| ITF M15 Monastir | 2021/09/29 10:45 | Guy Den Ouden v Mohamed Amine Aissa Khelifa | 6-0,6-3 |
| ITF M15 Monastir | 2021/09/22 08:00 | Guy Den Ouden v Ryota Tanuma | 6-7,2-6 |
| ITF M15 Allershausen | 2021/09/05 11:00 | Guy Den Ouden v Mick Veldheer | 6-0,6-4 |
| ITF M15 Allershausen | 2021/09/04 13:10 | Guy Den Ouden v Mats Rosenkranz | 6-4,4-6,6-4 |
| ITF M15 Allershausen | 2021/09/03 12:35 | Guy Den Ouden v Juan Ignacio Galarza | 7-5,6-3 |
| ITF M15 Allershausen | 2021/09/02 13:40 | Peter Heller v Guy Den Ouden | 6-7,3-6 |
| ITF M15 Allershausen | 2021/09/01 11:30 | Guy Den Ouden v Hazem Naw | 6-4,3-6,6-4 |