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 Hellfritsch, Lucas | 5-7,1-6 |
| Tel Aviv, Singles Qualifying M-ITF-ISR-01A | 2019/03/27 08:00 | Karlo Cubelic v Solberg, Christoffer | 3-6,6-4,4-6 |
| Tel Aviv, Singles Qualifying M-ITF-ISR-01A | 2019/03/26 11:30 | Karlo Cubelic v Vodavoz, Nir | 6-4,6-2 |
| Tel Aviv, Singles Qualifying M-ITF-ISR-01A | 2019/03/26 07:30 | Karlo Cubelic v Amoyal, Ofek | 6-3,6-3 |
| Manama, Singles M-ITF-BRN-01A | 2019/03/19 10:10 | Karlo Cubelic v Patrombon, Jeson | 4-6,2-6 |
| Manama, Singles M-ITF-BRN-01A | 2019/03/18 15:20 | Karlo Cubelic v Turcu, Mihnea Lorin Stefan | 6-0,6-3 |
| Manama, Singles M-ITF-BRN-01A | 2019/03/18 09:00 | Karlo Cubelic v Abdulnabi, Kareem | 6-3,6-0 |
| ITF M15 Kamen | 2019/06/24 12:00 | Guenther, Valentin v Bybel, Nicholas | 6-4,6-2 |
| ITF M15 Cancun | 2019/05/20 17:30 | Gonzalez, Wilfredo v Bybel, Nicholas | 7-6,6-0 |
| ITF M15 Cancun | 2019/05/20 13:30 | Eguez, Sebastian v Bybel, Nicholas | 1-6,0-6 |
| ITF M15 Cancun | 2019/05/15 13:30 | Bybel, Nicholas v Brymer, Gage | 3-6,4-6 |
| ITF M15 Cancun | 2019/05/13 17:30 | Christian Langmo v Bybel, Nicholas | 6-2,6-4 |
| ITF M15 Cancun | 2019/05/13 13:30 | Ortega, Joao Victor v Bybel, Nicholas | 0-6,0-6 |
| ITF M15 Cancun | 2019/05/10 14:00 | Bybel, Nicholas v Fox, David | 5-7,3-6 |
| ITF M15 Cancun | 2019/05/09 14:00 | Stoute, Isaac v Bybel, Nicholas | 6-7,6-3,1-6 |