Stadium: Court 2 Round: 25 Ground: Clay
| ITF M15 Sofia | 2021/07/06 07:00 | Hanwen Li v Felix Gill | 6-4,2-6,6-3 |
| Wimbledon | 2021/06/23 13:15 | Felix Gill v Marc Polmans | 6-7,2-6 |
| Wimbledon | 2021/06/22 12:40 | Danilo Petrovic v Felix Gill | 5-7,6-7 |
| Challenger Nottingham Qual | 2021/06/13 10:00 | Felix Gill v Alex Bolt | 6-7,4-6 |
| ITF M15 Novomoskovsk | 2021/06/03 10:00 | Felix Gill v Jose Fco. Vidal Azorin | 3-6,3-6 |
| ITF M15 Novomoskovsk | 2021/05/29 06:15 | Jose Fco. Vidal Azorin v Felix Gill | 7-6,6-1 |
| ITF M15 Novomoskovsk | 2021/05/28 07:15 | Felix Gill v Nikita Mashtakov | 7-5,6-7,6-4 |
| ITF M15 Novomoskovsk | 2021/05/27 10:40 | Michal Dembek v Felix Gill | 3-6,5-7 |
| ITF M25 Belgrade | 2021/06/27 12:00 | Nicolas Bruna v Aleksandar Mihailovic | 7-6,6-0 |
| ITF M15 Sarajevo | 2021/06/02 14:05 | Luka Petrovic v Aleksandar Mihailovic | 6-4,6-0 |
| ITF M25 Kiseljak | 2021/05/25 15:25 | Aleksandar Mihailovic v Francesco Forti | 1-6,1-6 |
| ITF M15 Brcko | 2021/05/16 07:00 | Valentin Lapalu v Aleksandar Mihailovic | 6-3,6-4 |