Stadium: Court 6 Round: 25 Ground: Clay
| ITF M15 Troisdorf | 2019/05/06 07:00 | Oscar Galimardanov v Karlo Cubelic | 3-6,6-3,10-6 |
| ITF M15 Sharm El Sheikh | 2019/04/09 08:00 | Karlo Cubelic v Lucas Hellfritsch | 5-7,1-6 |
| ITF M15 Tel Aviv | 2019/03/27 08:00 | Karlo Cubelic v Christoffer Solberg | 3-6,6-4,4-6 |
| ITF M15 Tel Aviv | 2019/03/26 11:30 | Karlo Cubelic v Nir Vodavoz | 6-4,6-2 |
| ITF M15 Tel Aviv | 2019/03/26 07:30 | Karlo Cubelic v Ofek Amoyal | 6-3,6-3 |
| ITF M15 Manama | 2019/03/19 10:10 | Karlo Cubelic v Jeson Patrombon | 4-6,2-6 |
| ITF M15 Manama | 2019/03/18 15:20 | Karlo Cubelic v Mihnea L.S. Turcu | 6-0,6-3 |
| ITF M15 Manama | 2019/03/18 09:00 | Karlo Cubelic v Kareem Abdulnabi | 6-3,6-0 |
| ITF M15 Kamen | 2019/06/24 12:00 | Valentin Guenther v Nicholas Bybel | 6-4,6-2 |
| ITF M15 Cancun | 2019/05/20 17:30 | Wilfredo Gonzalez v Nicholas Bybel | 7-6,6-0 |
| ITF M15 Cancun | 2019/05/20 13:30 | Sebastian Eguez v Nicholas Bybel | 1-6,0-6 |
| ITF M15 Cancun | 2019/05/15 13:30 | Nicholas Bybel v Gage Brymer | 3-6,4-6 |
| ITF M15 Cancun | 2019/05/13 17:30 | Christian Langmo v Nicholas Bybel | 6-2,6-4 |
| ITF M15 Cancun | 2019/05/13 13:30 | Joao Victor Ortega v Nicholas Bybel | 0-6,0-6 |
| ITF M15 Cancun | 2019/05/10 14:00 | Nicholas Bybel v David Fox | 5-7,3-6 |
| ITF M15 Cancun | 2019/05/09 14:00 | Isaac Stoute v Nicholas Bybel | 6-7,6-3,1-6 |