Stadium: Court 3 Round: 25 Ground: Clay
| ITF M15 - Novomoskovsk | 2021/05/27 10:40 | Michal Dembek v Felix Gill | 3-6,5-7 |
| ITF M15 - Lodz | 2021/08/19 10:00 | Maciej Rajski v Michal Dembek | 7-6,6-2 |
| ITF M15 - Lodz | 2021/08/17 08:00 | Jasza Szajrych v Michal Dembek | 0-6,6-7 |
| ITF M15 - Gdynia | 2021/08/12 10:30 | Daniel Michalski v Michal Dembek | 7-6,4-6,6-3 |
| ITF M15 - Gdynia | 2021/08/11 10:25 | Michal Dembek v Pawel Safuryn | 6-0,6-1 |
| ITF M25 - Grodzisk Mazowiecki | 2021/08/07 07:25 | David Poljak v Michal Dembek | 6-3,3-6,6-3 |
| ITF M25 - Grodzisk Mazowiecki | 2021/08/03 08:55 | Alan Bojarski v Michal Dembek | 3-6,6-4,2-6 |
| ITF M25 - Telavi | 2021/07/31 08:40 | Michal Dembek v Alessandro Ingarao | 2-6,1-6 |
| ITF M25 - Telavi | 2021/07/30 05:55 | Michal Dembek v Alexander Boborykin | 7-5,6-2 |
| ITF M15 - Doboj | 2021/07/15 08:00 | Zsombor Piros v Felix Gill | 7-5,6-7,6-2 |
| ITF M15 - Doboj | 2021/07/14 08:30 | Felix Gill v Aleksandar Mihailovic | 6-1,6-4 |
| 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 - Kval | 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 |