Stadium: Court 1 Round: 44 Ground: Hardcourt outdoor
| ITF M15 Opava | 2019/10/29 14:10 | Lahky, Nikolas v Lucas Catarina | 2-6,1-6 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/10/06 11:00 | Vinas, Ignacio v Lahky, Nikolas | 6-3,7-5 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/10/02 08:30 | Lahky, Nikolas v Dijkhuizen, Marc | 3-6,5-7 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/09/30 08:30 | Lahky, Nikolas v Pereira, Miguel Fernando | 2-6,6-4,10-2 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/09/29 11:00 | Lulli, Gregorio v Lahky, Nikolas | 7-5,1-6,5-10 |
| ITF M25 Ricany | 2019/09/22 08:00 | Lahky, Nikolas v Noah Thurner | 3-6,6-3,8-10 |
| Szekesfehervar, Singles Qualifying M-ITF-HUN-05A | 2019/09/02 08:00 | Juan Pablo Paz v Lahky, Nikolas | 6-2,6-2 |
| Szekesfehervar, Singles Qualifying M-ITF-HUN-05A | 2019/09/01 13:00 | Lahky, Nikolas v Marcell Bartakovics | 2-6,6-4,10-5 |
| ITF - M15 Sharm El Sheikh | 2019/11/03 08:00 | Cizelj-Zivkovic, Stefan v Mohd Adam Das, Shamirul Shahril | 2-6,3-6 |
| ITF - M15 Sharm El Sheikh | 2019/10/27 10:00 | Riedel, Tim v Cizelj-Zivkovic, Stefan | 6-4,6-4 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/10/13 08:30 | Skierkier, Boruch v Cizelj-Zivkovic, Stefan | 6-1,6-0 |
| Burgas, Singles Qualifying M-ITF-BUL-05A | 2019/10/07 07:00 | Cizelj-Zivkovic, Stefan v Mikhaylyuk, Ivan | 4-6,0-6 |
| ITF M15 Chornomorsk | 2019/09/22 07:30 | Cizelj-Zivkovic, Stefan v Ilnytskyy, Svyatoslav | 2-6,5-7 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/09/15 13:00 | Cizelj-Zivkovic, Stefan v Francesco Liucci | 2-6,0-6 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/09/15 08:00 | Janis, Jason v Cizelj-Zivkovic, Stefan | 7-5,2-6,6-10 |
| Ust-Kamenogorsk, Singles M-ITF-KAZ-06A | 2019/08/26 04:00 | Cizelj-Zivkovic, Stefan v Bogatin, David | 1-6,3-6 |