Stadium: Court 1 Round: 29 Ground: Clay
| ITF M15 Xativa | 2023/08/05 15:00 | Carlos Lopez Montagud v Ryan Nijboer | 6-1,6-1 |
| ITF M25 Oviedo | 2023/09/01 08:00 | Carlos Gimeno Valero v Carlos Lopez Montagud | 0-6,5-7 |
| ITF M25 Oviedo | 2023/08/31 09:30 | Carlos Lopez Montagud v Tomas C Abasolo | 6-1,7-5 |
| ITF M25 Oviedo | 2023/08/30 17:35 | Carlos Lopez Montagud v Giacomo Revelli | 6-3,6-2 |
| ITF M25 Oviedo | 2023/08/30 10:00 | Carlos Lopez Montagud v Jaime Caldes | 6-0,6-1 |
| Challenger Prague | 2023/08/21 14:00 | Facundo Mena v Carlos Lopez Montagud | 7-5,6-3 |
| Challenger Todi | 2023/08/15 10:20 | Miljan Zekic v Carlos Lopez Montagud | 6-7,6-3,6-4 |
| ITF M15 Xativa | 2023/08/06 16:55 | Carlos Lopez Montagud v Vilius Gaubas | 6-4,7-6 |
| ITF M15 Xativa | 2023/08/05 15:00 | Carlos Lopez Montagud v Ryan Nijboer | 6-1,6-1 |
| ITF M25 Oviedo | 2023/09/01 08:00 | Gian Marco Moroni v Ryan Nijboer | 5-7,2-6 |
| ITF M25 Oviedo | 2023/08/31 08:00 | Ryan Nijboer v Dali Blanch | 6-3,6-1 |
| ITF M25 Santander | 2023/08/24 13:30 | Ryan Nijboer v Svyatoslav Gulin | 6-3,6-7,3-6 |
| ITF M25 Santander | 2023/08/23 17:00 | Ryan Nijboer v Sergio Callejon Hernando | 6-1,7-6 |
| ITF M25 Santander | 2023/08/22 11:10 | Ryan Nijboer v Mikel Martinez | 6-1,6-2 |
| ITF M15 Xativa | 2023/08/05 15:00 | Carlos Lopez Montagud v Ryan Nijboer | 6-1,6-1 |
| ITF M15 Xativa | 2023/08/04 16:25 | Ryan Nijboer v Sergio Callejon Hernando | 6-2,6-3 |
| ITF M15 Xativa | 2023/08/03 16:30 | Ryan Nijboer v Alejandro T Alvarez | 6-1,6-3 |