Stadium: Court 1 Round: 54 Ground: Hardcourt indoor
| ITF M15 Sozopol | 2021/09/13 08:00 | Luigi Castelletti v George Lazarov | 3-6,4-6 |
| ITF M25 Sintra | 2021/09/05 08:30 | Alan F R Fierros v Luigi Castelletti | 6-2,6-0 |
| ITF M15 Perugia | 2021/07/18 09:00 | Wishaya Trongcharoenchaikul v Luigi Castelletti | 6-4,6-3 |
| ITF M15 L'Aquila | 2021/07/12 10:30 | Luigi Castelletti v Alessandro Procopio | 6-1,2-6,8-10 |
| ITF M15 L'Aquila | 2021/07/11 11:00 | Pedro Ortega v Luigi Castelletti | 3-6,3-6 |
| ITF M15 Almada | 2021/07/07 12:15 | Egor Noskin v Luigi Castelletti | 6-7,7-5,6-1 |
| ITF M15 Almada | 2021/07/05 10:00 | Harry Wendelken v Luigi Castelletti | 6-0,6-0 |
| ITF M15 Gaiba | 2021/06/09 12:50 | Benjamin Lock v Luigi Castelletti | 6-1,6-3 |
| ITF M15 Sozopol | 2021/10/11 09:00 | Ilya Snitari v David Tomic | 6-0,6-1 |
| ITF M15 Sozopol | 2021/10/04 07:00 | David Tomic v Vlad Stoica | 6-4,2-6,7-10 |
| ITF M15 Bad Waltersdorf | 2021/08/30 09:00 | Fausto Tabacco v David Tomic | 6-2,6-1 |
| ITF M15 Bad Waltersdorf | 2021/08/22 07:00 | David Tomic v Philip Bachmaier | 2-6,2-6 |
| ITF M15 Warmbad-Villach | 2021/08/16 07:00 | Philip Bachmaier v David Tomic | 6-3,6-1 |
| ITF M25 Telfs | 2021/07/11 09:00 | David Tomic v Samuel Paulovcak | 5-7,4-6 |
| ITF Austria F6 | 2018/08/04 07:00 | David Tomic v Pietro Pirolt | 6-3,6-2 |