Stadium: Court 5 Round: 25 Ground: Clay
| Challenger Seville selejtezők | 2021/09/05 10:30 | Alberto Barroso Campos v Lucas Gerch | 2-6,1-6 |
| Challenger Seville selejtezők | 2021/09/07 11:00 | Lucas Gerch v Carlos Taberner | 1-6,4-6 |
| Challenger Seville selejtezők | 2021/09/06 09:00 | Mats Rosenkranz v Lucas Gerch | 3-6,7-5,4-6 |
| Challenger Seville selejtezők | 2021/09/05 10:30 | Alberto Barroso Campos v Lucas Gerch | 2-6,1-6 |
| Challenger Warsaw | 2021/08/22 13:35 | Johan Nikles v Lucas Gerch | 6-4,7-5 |
| ITF M25 Frankfurt am Main | 2021/08/14 12:05 | Lucas Gerch v Yshai Oliel | 6-4,3-6,5-7 |
| ITF M25 Frankfurt am Main | 2021/08/13 14:00 | Lucas Gerch v Louis Wessels | 3-6,6-3,6-4 |
| ITF M25 Frankfurt am Main | 2021/08/12 11:15 | Matthew Romios v Lucas Gerch | 6-7,1-6 |
| ITF M25 Frankfurt am Main | 2021/08/11 15:30 | Kai Wehnelt v Lucas Gerch | 6-3,2-6,4-6 |
| ITF M25 Madrid | 2021/09/14 08:30 | Alberto Barroso Campos v Xavier Matas Ortega | 6-1,2-0 |
| Challenger Seville selejtezők | 2021/09/05 10:30 | Alberto Barroso Campos v Lucas Gerch | 2-6,1-6 |
| ITF M15 Xativa | 2021/08/04 08:00 | Alberto Barroso Campos v Miguel Perez Pena | 7-5,3-6,2-6 |
| ITF M25 Denia | 2021/07/27 08:00 | Alberto Barroso Campos v Max Alcala Gurri | 2-6,6-4,3-10 |
| ITF M25 Denia | 2021/07/26 08:00 | Alberto Barroso Campos v Javier Molino | 6-1,7-6 |
| ITF M25 Denia | 2021/07/25 14:30 | Alberto Barroso Campos v Inaki Cabrera Bello | 6-3,6-2 |
| Challenger Pozoblanco | 2021/07/19 17:55 | Alberto Barroso Campos v Adrian Menendez-Maceiras | 2-6,4-6 |
| ITF M15 Monastir | 2021/06/20 09:30 | Alberto Barroso Campos v Lorenzo Lorusso | 5-7,4-6 |