Stadium: Court 9 Round: 62 Ground: Clay
| UTR Pro Beograd | 2023/10/07 07:30 | Hernando J E Isnardi v Aleksa Pisaric | 3-6,6-7 |
| UTR Pro Beograd | 2023/10/06 06:00 | Hernando J E Isnardi v Obrad Markovski | 6-3,6-6 |
| UTR Pro Beograd | 2023/10/03 10:30 | Hernando J E Isnardi v Luka Todorovic | 6-3,6-4 |
| UTR Pro Beograd | 2023/10/02 10:32 | Hernando J E Isnardi v Yanais Laurent | 4-6,4-6 |
| ITF M25 Zlatibor | 2023/09/29 07:30 | Hernando J E Isnardi v Matej Dodig | 4-6,2-6 |
| ITF M25 Zlatibor | 2023/09/28 08:40 | Corentin Denolly v Hernando J E Isnardi | 3-6,4-6 |
| ITF M25 Zlatibor | 2023/09/27 14:30 | Drazen Petrovic v Hernando J E Isnardi | 2-6,4-6 |
| ITF M25 Zlatibor | 2023/09/27 11:00 | Aleksandar Ljubojevic v Hernando J E Isnardi | 6-4,1-6,8-10 |
| ITF M15 Vigo | 2023/10/11 07:30 | Carlos Gimeno Valero v Sergio Callejon Hernando | 6-1,6-2 |
| ITF M15 Vigo | 2023/10/10 07:30 | Sergio Callejon Hernando v David Naharro | 6-3,6-2 |
| ITF M15 Vigo | 2023/10/09 07:30 | Sergio Callejon Hernando v Joan Busoms Puig | 6-0,6-0 |
| ITF M25 Sabadell | 2023/09/25 07:30 | Jordi Mas De Ugarte v Sergio Callejon Hernando | 7-6,6-1 |
| ITF M25 Sabadell | 2023/09/24 07:30 | Joan Busoms Puig v Sergio Callejon Hernando | 1-6,4-6 |
| ITF M25 Madrid | 2023/09/12 12:05 | Miguel Damas v Sergio Callejon Hernando | 7-6,6-4 |
| ITF M15 Madrid | 2023/09/06 13:15 | Sergio Callejon Hernando v Felix Gill | 2-6,2-6 |
| ITF M25 Oviedo | 2023/08/30 14:30 | Sergio Callejon Hernando v Carlos Gimeno Valero | 1-6,4-6 |