Stadium: Court 6 Round: 62 Ground: Clay
| ITF M15 Opatija | 2021/03/21 11:00 | Matthias Uwe Kask v Bozo Barun | 2-6,4-6 |
| ITF M15 Monastir | 2021/04/11 08:00 | Luigi Castelletti v Louis Allen | 4-6,6-2,3-10 |
| ITF M15 Monastir | 2021/04/04 09:00 | Luigi Castelletti v Michal Mikula | 3-6,6-7 |
| ITF M15 Monastir | 2021/03/14 11:00 | Luigi Castelletti v Yanais Laurent | 0-6,2-6 |
| ITF M15 Monastir | 2021/03/07 10:30 | Luigi Castelletti v Sabit Suntic | 2-6,5-7 |
| ITF M15 Monastir | 2021/02/28 10:30 | Luigi Castelletti v Milan Drinic | 4-6,0-6 |
| ITF M15 Monastir | 2021/02/22 08:00 | Luigi Castelletti v Fons Van Sambeek | 6-7,4-6 |
| ITF M15 Monastir | 2021/02/21 11:00 | Erwin Troebinger v Luigi Castelletti | 6-7,2-6 |
| ITF M15 Monastir | 2021/01/06 08:00 | Tom Jomby v Luigi Castelletti | 4-6,6-4,4-6 |