Estadio: Hard 21 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Heraklion | 2021/05/24 06:30 | Mattia Bellucci v George Houghton | 6-4,6-3 |
| ITF M15 Heraklion | 2021/05/23 08:00 | Mattia Bellucci v 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 | Leon Hoeveler 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 Sharm El Sheikh | 2021/04/08 07:30 | David Poljak v Mattia Bellucci | 6-2,6-1 |
| ITF M15 Sharm El Sheikh | 2021/04/07 10:30 | Mattia Bellucci v Lukas Krainer | 7-6,7-6 |
| ITF M15 Heraklion | 2021/05/24 06:30 | Christos Keisidis v William Griffith | 2-6,3-6 |
| ITF M15 Heraklion | 2021/05/23 08:30 | Jimmy Yang v William Griffith | 2-6,0-6 |
| ITF M15 Heraklion | 2021/05/18 08:00 | William Griffith v Artur Soghoyan | 4-6,6-1,7-10 |
| ITF M15 Heraklion | 2021/05/17 08:00 | William Griffith v Lorenzo Joaquin Rodriguez | 6-4,1-6,10-6 |
| UTR Pro Tennis Series Atlanta | 2021/04/18 14:30 | William Griffith v Alexis Gurmendi | 6-4,6-3 |
| UTR Pro Tennis Series Atlanta | 2021/04/17 12:30 | William Griffith v Murphy Cassone | 6-7,6-3,5-3 |
| UTR Pro Tennis Series Atlanta | 2021/04/16 12:30 | Jonny Ho v William Griffith | 2-6,4-5 |
| UTR Pro Tennis Series Atlanta | 2021/04/15 15:30 | Jose Antonio Dugo Reyes v William Griffith | 1-6,0-6 |