Stadium: Court 3 Round: 25 Ground: Clay
| ITF M25 - Poznan | 2021/08/24 16:10 | Harry Wendelken v Fermin Calvo Barcelo | 6-2,6-3 |
| ITF M25 - Poznan | 2021/08/24 08:00 | Juliusz Bienkiewicz v Fermin Calvo Barcelo | 4-6,2-6 |
| ITF M25 - Poznan | 2021/08/22 08:00 | Fermin Calvo Barcelo v Adam Bronka | 6-0,6-2 |
| ITF M15 - Lodz | 2021/08/16 09:30 | Leonardo Aboian v Fermin Calvo Barcelo | 3-6,7-6,10-7 |
| ITF M15 - Lodz | 2021/08/15 09:30 | Yujiro Onuma v Fermin Calvo Barcelo | 1-6,1-6 |
| ITF - M15 - Monastir | 2021/07/18 09:00 | Fermin Calvo Barcelo v Nikolay Sysoev | 3-6,6-4,6-10 |
| ITF - M15 - Monastir | 2021/07/12 08:00 | Jake Van Emburgh v Fermin Calvo Barcelo | 6-3,3-6,10-6 |
| ITF - M15 - Monastir | 2021/07/05 09:00 | Fermin Calvo Barcelo v Valentin Vacherot | 4-6,1-6 |
| 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 |