Stadium: Court 8 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Ramat Hasharon | 2021/05/03 07:00 | Karlo Cubelic v Ofek Amoyal | 6-3,6-3 |
| ITF M25 Meerbusch | 2021/04/11 13:00 | Tomas Papik v Karlo Cubelic | 3-6,2-6 |
| ITF M15 Sharm El Sheikh | 2021/04/06 07:30 | Karlo Cubelic v Lukas Pokorny | 6-7,1-6 |
| ITF M15 Sharm El Sheikh | 2021/04/05 10:00 | Karlo Cubelic v Inaki Cabrera Bello | 4-6,7-5,10-8 |
| ITF M15 Sharm El Sheikh | 2021/03/30 08:40 | Mattia Bellucci v Karlo Cubelic | 6-2,6-2 |
| ITF M15 Sharm El Sheikh | 2021/03/29 13:00 | Jack Gibbens v Karlo Cubelic | 3-6,4-6 |
| ITF M15 Sharm El Sheikh | 2021/03/28 16:00 | Inaki Cabrera Bello v Karlo Cubelic | 1-6,5-7 |
| ITF M15 Sharm El Sheikh | 2021/03/24 11:55 | Oscar Jose Gutierrez v Karlo Cubelic | 4-6,6-3,7-6 |
| ITF M15 Ramat Hasharon | 2021/05/03 07:00 | Lev Levyatov v Bradley Paliska | 0-6,3-6 |
| ITF M25 Angers | 2021/04/18 13:00 | Bradley Paliska v Axel Garcian | 1-6,2-6 |
| ITF M25 Reus | 2021/04/11 11:00 | Bradley Paliska v Miguel Damas | 7-5,3-6,9-11 |
| ITF M15 Monastir | 2021/03/30 08:00 | Luca Potenza v Bradley Paliska | 6-1,7-5 |
| ITF M15 Monastir | 2021/03/29 09:00 | Yannick Wunderlich v Bradley Paliska | 3-6,4-6 |
| ITF M15 Monastir | 2021/03/21 18:00 | Edoardo Zanada v Bradley Paliska | 2-6,7-6,10-8 |
| ITF M25 Vale Do Lobo | 2021/03/11 16:05 | Bradley Paliska v Sebastian Fanselow | 2-6,2-6 |
| ITF M25 Vale Do Lobo | 2021/03/09 11:50 | Bradley Paliska v Alexandre Ruscica | 1-6,6-3,10-5 |