Stadium: Court 3 Round: 44 Ground: Hardcourt outdoor
| ITF M25 Idanha-A-Nova | 2021/07/12 10:30 | Zemel, Yankel v Ivan Zaytsev | 6-3,6-3 |
| ITF M25 Idanha-A-Nova | 2021/07/11 08:00 | Zemel, Yankel v David Quayle | 7-6,6-2 |
| ITF M15 Almada | 2021/07/05 09:00 | Zemel, Yankel v Lambling, Raphael | 4-6,7-6,8-10 |
| ITF M15 Almada | 2021/07/04 12:00 | Zemel, Yankel v Liborio, Pedro | 6-0,6-0 |
| ITF - M15 Héraklion | 2021/06/11 09:20 | Musialek, Alexis v Zemel, Yankel | 7-6,3-6,6-1 |
| ITF - M15 Héraklion | 2021/06/10 07:30 | Petros Tsitsipas v Zemel, Yankel | 6-7,2-6 |
| ITF - M15 Héraklion | 2021/06/08 08:00 | Zemel, Yankel v Boyer, Dusty H | 6-4,6-3 |
| ITF - M15 Héraklion | 2021/06/01 06:30 | Stalder, Reese v Zemel, Yankel | 6-1,6-4 |
| ITF M25 Idanha-A-Nova | 2021/07/12 12:00 | Guilherme Valdoleiros v Osgar O'Hoisin | 4-6,1-6 |
| ITF M25 Idanha-A-Nova | 2021/07/11 10:30 | Osgar O'Hoisin v Breysach , Martin | 6-4,6-4 |
| ITF M25 Bakio | 2021/06/30 08:30 | Osgar O'Hoisin v Kaichi Uchida | 3-6,5-7 |
| ITF M25 Bakio | 2021/06/29 08:00 | Brugnerotto, Marco v Osgar O'Hoisin | 2-6,6-4,8-10 |
| ITF M25 Bakio | 2021/06/27 15:40 | Antonio Prat v Osgar O'Hoisin | 2-6,2-6 |
| Coupe Davis | 2021/06/19 08:00 | Aleksandre Bakshi v Osgar O'Hoisin | 6-4,6-3 |
| Coupe Davis | 2021/06/18 09:20 | Osgar O'Hoisin v Liam Delicata | 6-4,6-2 |
| Coupe Davis | 2021/06/17 07:50 | Valentin Vacherot v Osgar O'Hoisin | 6-3,6-4 |