Stadium: Court 16 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Tavira | 2023/10/17 14:50 | Daniel Merida Aguilar v Mario G Fernandez | 6-1,6-4 |
| Challenger Seville | 2023/09/04 15:20 | Valentin Royer v Mario G Fernandez | 6-3,7-6 |
| ITF M15 Monastir | 2023/08/16 08:30 | Mario G Fernandez v Daniele Rapagnetta | 6-3,6-1 |
| ITF M15 Monastir | 2023/08/14 14:00 | Mario G Fernandez v Vito Dell'Elba | 6-2,6-0 |
| ITF M15 Monastir | 2023/08/13 08:00 | Mario G Fernandez v Christopher Chien | 6-0,6-0 |
| ITF M15 Monastir | 2023/08/10 09:35 | Mikhail Gorokhov v Mario G Fernandez | 6-3,7-6 |
| ITF M15 Monastir | 2023/08/09 09:05 | Omar Knani v Mario G Fernandez | 0-6,1-6 |
| ITF M25 Porto | 2023/07/28 13:20 | Kenny de Schepper v Mario G Fernandez | 6-3,6-2 |
| ITF M15 Heraklion | 2023/10/24 06:30 | Guy Den Heijer v Joshua Charlton | 7-6,7-5 |
| ITF M15 Heraklion | 2023/10/23 10:30 | Guy Den Heijer v Vojtech Mares | 5-7,7-6,10-6 |
| ITF M15 Heraklion | 2023/10/19 08:45 | Guy Den Heijer v Gabriel Decamps | 2-6,4-6 |
| ITF M25 Santa Margherita | 2023/09/25 08:00 | Niels Visker v Guy Den Heijer | 5-7,6-4,11-9 |
| ITF M25 Santa Margherita | 2023/09/24 08:00 | Niccolo Ciavarella v Guy Den Heijer | 6-2,3-6,7-10 |
| ITF M25 Santa Margherita | 2023/09/18 08:30 | Guy Den Heijer v Toby Martin | 5-7,6-3,7-10 |
| ITF M15 Haren | 2023/09/07 17:25 | Guy Den Heijer v Adrian Oetzbach | 6-7,6-7 |
| ITF M15 Haren | 2023/09/05 17:30 | Guy Den Heijer v Kjell De Hek | 6-3,6-1 |