Stadium: Hard 20 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Heraklion | 2021/06/03 10:50 | Antonio Cayetano March v Federico Arnaboldi | 3-6,4-6 |
| ITF M15 Heraklion | 2021/06/02 10:55 | Marvin Moeller v Antonio Cayetano March | 3-6,6-7 |
| ITF M15 Valldoreix | 2021/05/11 09:00 | Antonio Cayetano March v Rishab Agarwal | 7-5,4-6,10-12 |
| ITF M15 Valldoreix | 2021/05/10 10:00 | Jaume Pla Malfeito v Antonio Cayetano March | 3-6,3-6 |
| ITF M15 Valldoreix | 2021/05/09 14:00 | Antonio Cayetano March v Lluc Mir Anglada | 6-4,6-3 |
| Challenger Salinas 2 | 2021/04/28 15:00 | Nicolas Mejia v Antonio Cayetano March | 6-1,6-2 |
| Challenger Salinas | 2021/04/19 18:55 | Jelle Sels v Antonio Cayetano March | 6-4,6-3 |
| ITF M15 Antalya | 2021/03/30 11:00 | Benjamin Hassan v Antonio Cayetano March | 1-6,6-3,6-1 |
| ITF M15 Heraklion | 2021/06/08 06:30 | Sean Hodkin v Christos Keisidis | 6-4,5-7,4-10 |
| ITF M15 Heraklion | 2021/06/07 09:00 | Christos Keisidis v Alexander Gaponenko | 6-4,6-1 |
| ITF M15 Heraklion | 2021/06/06 11:00 | Michel-Alexandre Fortin v Christos Keisidis | 0-6,0-6 |
| ITF M15 Heraklion | 2021/05/31 06:30 | Mattia Bellucci v Christos Keisidis | 6-4,6-3 |
| ITF M15 Heraklion | 2021/05/24 06:30 | Christos Keisidis v William Griffith | 2-6,3-6 |
| ITF M15 Heraklion | 2021/05/23 08:00 | Matic Dimic v Christos Keisidis | 2-6,4-6 |
| ITF M15 Heraklion | 2021/05/19 06:30 | Christos Keisidis v Aristotelis Thanos | 2-6,2-6 |
| ITF M15 Heraklion | 2020/03/10 08:00 | Ioannis Xilas v Christos Keisidis | 0-6,6-4,10-6 |