Stadium: Centrale Round: 25 Ground: Hardcourt outdoor
| Wimbledon, London, Great Britain | 2019/06/24 12:30 | Ramkumar Ramanathan v Lacko, Lukas | 6-3,6-2 |
| Ilkley, Great Britain | 2019/06/19 17:15 | Lacko, Lukas v Antoine Hoang | 3-6,5-7 |
| Ilkley, Great Britain | 2019/06/18 10:00 | Lacko, Lukas v Menendez-Maceiras, Adrian | 6-3,6-4 |
| ATP - Bois-le-Duc | 2019/06/08 09:00 | Jannik Sinner v Lacko, Lukas | 6-7,7-6,6-2 |
| Challenger - Surbiton | 2019/06/06 12:25 | Lacko, Lukas v Ebden, Matthew | 5-7,6-7 |
| Challenger - Surbiton | 2019/06/04 11:25 | Gojowczyk, Peter v Lacko, Lukas | 6-7,6-7 |
| Challenger - Surbiton | 2019/06/03 10:00 | Brown, Dustin v Lacko, Lukas | 3-6,2-6 |
| Open de France | 2019/05/20 09:50 | Manuel Guinard v Lacko, Lukas | 7-6,4-6,6-1 |
| Challenger Recanati | 2019/07/01 17:30 | Vanni, Luca v Avidzba, Alen | 6-7,4-6 |
| ITF M25 Montauban | 2019/06/26 07:00 | Maxime Chazal v Avidzba, Alen | 6-1,1-6,6-3 |
| Parma II, Italy | 2019/06/17 12:00 | Dimitar Kuzmanov v Avidzba, Alen | 6-4,4-6,6-2 |
| Karlsruhe, Singles M-ITF-GER-04A | 2019/06/05 13:15 | Eriksson, Markus v Avidzba, Alen | 6-7,6-0,2-6 |
| ITF - M25 Vic | 2019/05/22 10:00 | Avidzba, Alen v Alejandro Moro Canas | 6-4,3-6,6-7 |
| Casale Monferrato, Singles M-ITF-ITA-09A | 2019/05/18 14:20 | Avidzba, Alen v Giovanni Fonio | 6-3,6-2 |
| Casale Monferrato, Singles M-ITF-ITA-09A | 2019/05/17 08:00 | Avidzba, Alen v Frinzi, Mattia | 6-1,6-1 |
| Casale Monferrato, Singles M-ITF-ITA-09A | 2019/05/16 11:35 | Avidzba, Alen v Andrea Guerrieri | 6-1,7-5 |