Stadium: Hard 21 Round: 62 Ground: Hardcourt outdoor
| ITF - M15 Héraklion | 2021/05/30 06:30 | Mattia Bellucci v Jimmy Yang | 6-2,7-6 |
| ITF - M15 Héraklion | 2021/05/25 06:30 | Mattia Bellucci v Griffith, William | 5-7,2-6 |
| ITF - M15 Héraklion | 2021/05/24 06:30 | Mattia Bellucci v George Houghton | 6-4,6-3 |
| ITF - M15 Héraklion | 2021/05/23 08:00 | Mattia Bellucci v Ansari, Austin Ansari | 6-4,7-5 |
| ITF M15 Troisdorf | 2021/05/12 09:00 | Dan Added v Mattia Bellucci | 4-6,6-4,7-6 |
| ITF M15 Troisdorf | 2021/05/11 09:25 | Remy Bertola v Mattia Bellucci | 4-6,2-6 |
| ITF M15 Troisdorf | 2021/05/10 12:30 | Hoeveler, Leon v Mattia Bellucci | 2-6,4-6 |
| ITF M15 Troisdorf | 2021/05/09 13:00 | Yvo Panak v Mattia Bellucci | 3-6,4-6 |
| ITF - M15 Héraklion | 2021/05/24 06:30 | Keisidis, Christos v Griffith, William | 2-6,3-6 |
| ITF - M15 Héraklion | 2021/05/23 08:00 | Dimic, Matic v Keisidis, Christos | 2-6,4-6 |
| ITF - M15 Héraklion | 2021/05/19 06:30 | Keisidis, Christos v Aristotelis Thanos | 2-6,2-6 |
| ITF - M15 Héraklion | 2020/03/10 08:00 | Ioannis Xilas v Keisidis, Christos | 0-6,6-4,10-6 |
| ITF - M15 Héraklion | 2020/03/04 12:10 | Keisidis, Christos v Cornut-Chauvinc, Antoine | 5-7,2-6 |
| ITF - M15 Héraklion | 2020/02/26 11:25 | Kalovelonis, Markos v Keisidis, Christos | 5-7,6-4,6-4 |
| ITF - M15 Héraklion | 2020/02/25 08:00 | Keisidis, Christos v Nicolas Tepmahc | 6-3,4-6,13-11 |
| ITF - M15 Héraklion | 2020/02/24 08:30 | Mathys Erhard v Keisidis, Christos | 4-6,6-3,12-14 |