| ITF - M15 Helsinki | 2021/06/05 07:00 | Lucas Catarina v Lilian Marmousez | 3-6,3-6 |
| ITF - M15 Helsinki | 2021/06/04 07:00 | Lucas Catarina v Clement Tabur | 4-6,7-5,6-3 |
| ITF - M15 Helsinki | 2021/06/03 08:50 | Lucas Catarina v Andrea Del Federico | 6-0,6-2 |
| ITF - M15 Helsinki | 2021/06/02 06:30 | Lucas Catarina v Vladimir Ivanov | 7-5,1-6,6-2 |
| Challenger - Oeiras | 2021/05/24 10:00 | Lucas Catarina v Nikolas Sanchez Izquierdo | 4-6,2-6 |
| Challenger - Oeiras | 2021/05/23 10:00 | Lucas Catarina v Ronald Slobodchikov | 6-1,6-3 |
| ITF - M15 Monastir | 2021/05/09 08:30 | Luca Potenza v Lucas Catarina | 1-6,6-2,6-1 |
| ITF - M15 Monastir | 2021/05/08 08:30 | Lucas Catarina v Alexander Donski | 7-6,1-6,6-4 |