| ITF M15 Melilla | 2021/09/21 08:00 | Gabarro, Xavier v Kirill Mishkin | 3-6,2-6 |
| ITF M15 Melilla | 2021/09/20 14:30 | Gabarro, Xavier v Martinez Garcia, Jesus | 6-1,6-1 |
| ITF M25 Madrid | 2021/09/15 06:45 | Valentin Lapalu v Gabarro, Xavier | 6-3,6-4 |
| ITF M25 Madrid | 2021/09/14 06:55 | Emilien Voisin v Gabarro, Xavier | 3-6,7-6,9-11 |
| ITF M25 Madrid | 2021/09/13 08:00 | Eminefendic, Ervin Haris v Gabarro, Xavier | 3-6,3-6 |
| UTR Pro Tennis Series Barcelona | 2021/08/15 06:30 | Gabarro, Xavier v Mendoza, Alejandro | 2-6,2-4 |
| UTR Pro Tennis Series Barcelona | 2021/08/13 06:30 | Gabarro, Xavier v Kolisnyk, Olexiy | 3-6,3-6 |
| UTR Pro Tennis Series Barcelona | 2021/08/11 07:00 | Kalovelonis, Markos v Gabarro, Xavier | 6-3,6-0 |
| Challenger Kyiv | 2021/09/07 07:00 | Filip Cristian Jianu v Richard Zusman | 6-4,6-1 |
| ITF M15 Chornomorsk | 2021/08/31 08:45 | Richard Zusman v Tashbulatov, Dostanbek | 6-7,5-7 |
| ITF M25 Koksijde | 2021/08/15 13:30 | Richard Zusman v Max Cunat | 6-7,2-6 |
| ITF M15 Valldoreix | 2021/05/12 09:50 | Roumane, Rayane v Richard Zusman | 3-6,6-3,6-3 |
| ITF - M25 Reus | 2021/04/11 07:00 | Emilio Nava v Richard Zusman | 6-4,7-6 |
| ITF - M15 Antalya | 2021/03/28 06:30 | Ovcharov, Alexander v Richard Zusman | 6-3,6-3 |
| ITF - M15 Antalya | 2021/03/21 07:00 | Ivan Denisov v Richard Zusman | 7-5,6-4 |
| ITF - M15 Antalya | 2021/03/16 09:30 | Richard Zusman v Peter Fajta | 5-7,5-7 |