Stadium: Hard 20 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Heraklion | 2021/05/22 06:30 | Yuta Shimizu v Yshai Oliel | 3-6,6-4,6-2 |
| ITF M15 Heraklion | 2021/05/21 08:00 | Edoardo Graziani v Yshai Oliel | 1-6,0-6 |
| ITF M15 Heraklion | 2021/05/20 09:50 | Max Wiskandt v Yshai Oliel | 6-3,1-6,2-6 |
| ITF M15 Heraklion | 2021/05/19 08:00 | Ioannis Xilas v Yshai Oliel | 3-6,0-6 |
| ITF M15 Jerusalem | 2021/05/15 07:30 | Edan Leshem v Yshai Oliel | 6-3,6-3 |
| ITF M15 Jerusalem | 2021/05/14 07:30 | Yshai Oliel v Ben Patael | 7-6,7-6 |
| ITF M15 Jerusalem | 2021/05/13 07:30 | Yshai Oliel v Alexander Cozbinov | 6-3,4-6,6-3 |
| ITF M15 Jerusalem | 2021/05/12 07:00 | Yshai Oliel v Simon Freund | 6-0,7-5 |
| ITF M15 Sibenik | 2021/05/19 17:05 | Martin Breysach v Jose Fco. Vidal Azorin | 6-4,3-6,2-6 |
| ITF M15 Sibenik | 2021/05/18 08:00 | Jaimee Floyd Angele v Martin Breysach | 7-5,6-1 |
| ITF M15 Sibenik | 2021/05/17 11:00 | Martin Zeljenka v Martin Breysach | 6-7,3-6 |
| ITF M15 Sibenik | 2021/05/16 10:00 | Rafael Kis Balazs v Martin Breysach | 0-6,4-6 |
| ITF M15 Majadahonda | 2021/05/02 16:15 | Alexis Musialek v Martin Breysach | 6-1,6-1 |
| ITF M15 Las Palmas | 2021/04/25 14:30 | Rafael Giotis v Martin Breysach | 5-7,6-2,10-4 |
| ITF M15 Sibenik | 2021/04/20 12:15 | Martin Breysach v David Pichler | 2-6,1-6 |
| Challenger Lille | 2021/03/21 15:15 | Martin Breysach v Filip Cristian Jianu | 3-6,3-6 |