Stadium: Court 2 Round: 25 Ground: Clay
| Challenger Antalya | 2021/11/30 09:35 | Nuno Borges v Ergi Kirkin | 6-4,6-3 |
| Challenger Manama | 2021/11/22 15:00 | Ergi Kirkin v Cem Ilkel | 4-6,2-6 |
| Challenger Bratislava | 2021/11/07 14:35 | Ergi Kirkin v Milos Karol | 1-6,6-7 |
| Challenger Tenerife | 2021/11/01 16:00 | Tallon Griekspoor v Ergi Kirkin | 6-2,6-2 |
| Challenger Losinj | 2021/10/19 08:00 | Raul Brancaccio v Ergi Kirkin | 6-3,3-6,6-2 |
| Challenger Napoli | 2021/10/06 08:00 | Stefano Travaglia v Ergi Kirkin | 7-6,6-3 |
| Challenger Sibiu | 2021/09/30 11:00 | Thanasi Kokkinakis v Ergi Kirkin | 6-1,6-1 |
| Challenger Sibiu | 2021/09/27 12:45 | Ergi Kirkin v Alexey Vatutin | 7-5,4-6,6-1 |
| ITF M25 Lesa | 2021/08/26 15:45 | Matias Franco Descotte v Manuel Mazza | 6-3,3-6,7-6 |
| ITF M25 Lesa | 2021/08/24 16:30 | Manuel Mazza v Giannicola Misasi | 6-1,6-1 |
| ITF M25 Lesa | 2021/08/23 12:10 | Manuel Mazza v Antonio Caruso | 6-2,6-1 |
| ITF M15 Pescara | 2021/08/16 07:30 | Manuel Mazza v Giorgio Tabacco | 6-2,4-6,5-10 |
| ITF M15 Pescara | 2021/08/15 07:30 | Alessandro Pecci v Manuel Mazza | 6-7,1-6 |
| Challenger San Marino | 2021/08/10 13:25 | Manuel Mazza v Hugo Dellien | 4-6,5-7 |
| Challenger San Marino | 2021/08/09 11:00 | Alexander Shevchenko v Manuel Mazza | 6-2,6-7,1-6 |
| Challenger San Marino | 2021/08/08 08:00 | Manuel Mazza v Matteo Martineau | 6-1,3-6,6-3 |