Stadium: Court 5 Round: 26 Ground: Clay
| ITF M15 - La Nucia | 2021/03/10 12:42 | Miguel Damas v Nathan Seateun | 3-6,1-6 |
| ITF M15 - La Nucia | 2021/03/10 10:30 | Miguel Damas v Nathan Seateun | 3-6,1-6 |
| ITF M15 - La Nucia | 2021/03/09 15:45 | Nathan Seateun v Miguel Damas | 7-5,6-1 |
| ITF M15 - La Nucia | 2021/03/09 11:00 | Nathan Seateun v Leopold Zima | 6-3,7-6 |
| ITF M15 - Grenoble | 2021/02/07 15:30 | Nathan Seateun v Maxence Broville | 4-6,2-6 |
| ITF - M15 - Monastir | 2021/01/06 10:30 | Alexander Kotzen v Nathan Seateun | 6-2,6-7,6-3 |
| ITF - M15 - Monastir | 2021/01/01 10:55 | Kaichi Uchida v Nathan Seateun | 6-1,6-3 |
| ITF - M15 - Monastir | 2020/12/31 09:50 | Nathan Seateun v Axel Garcian | 6-2,7-6 |
| ITF M15 - La Nucia | 2021/03/10 13:15 | Giovanni Mpetshi Perricard v Nikolas Sanchez Izquierdo | 4-6,6-4,3-6 |
| Challenger - Gran Canaria | 2021/03/03 13:00 | Alessandro Giannessi v Nikolas Sanchez Izquierdo | 7-6,7-5 |
| Challenger - Gran Canaria | 2021/03/01 15:30 | Nikolas Sanchez Izquierdo v Andrea Pellegrino | 5-7,7-5,6-3 |
| Challenger - Gran Canaria | 2021/02/22 10:00 | Alex Molcan v Nikolas Sanchez Izquierdo | 7-6,6-3 |
| Challenger - Gran Canaria | 2021/02/21 10:00 | Tomas Q Perez v Nikolas Sanchez Izquierdo | 1-6,1-6 |
| Challenger Cherbourg | 2021/02/07 14:20 | Nikolas Sanchez Izquierdo v Sander Arends | 6-0,2-6,5-7 |
| UTR Pro Tennis Series - Barcelona | 2021/02/03 09:00 | Jaume Pla Malfeito v Nikolas Sanchez Izquierdo | 1-6,3-6 |
| UTR Pro Tennis Series - Barcelona | 2021/02/01 09:00 | Paul Cayre v Nikolas Sanchez Izquierdo | 4-6,4-5 |