| Challenger - Quimper | 2021/02/03 11:00 | Mathias Bourgue v Lacko, Lukas | 2-6,2-6 |
| Challenger - Quimper | 2021/01/25 12:30 | Lacko, Lukas v Istomin, Denis | 3-6,7-6,6-7 |
| Open d'Australie | 2021/01/11 11:55 | Lacko, Lukas v Frederico Ferreira Silva | 3-6,2-6 |
| Challenger Bratislava | 2020/11/10 16:35 | Lacko, Lukas v Stakhovsky, Sergiy | 5-7,6-7 |
| Challenger - Hambourg | 2020/10/26 12:20 | Lacko, Lukas v Nikola Milojevic | 5-7,4-6 |
| Challenger Ismaning | 2020/10/21 18:50 | Gunneswaran, Prajnesh v Lacko, Lukas | 6-4,5-7,6-4 |
| Challenger Ismaning | 2020/10/20 14:00 | Lacko, Lukas v Max Hans Rehberg | 5-7,7-6,6-1 |
| Challenger Biella | 2020/09/29 08:00 | Lacko, Lukas v Horansky, Filip | 2-6,2-6 |
| Challenger - Quimper | 2021/01/26 13:20 | Arthur Cazaux v Illya Marchenko | 4-6,5-7 |
| ITF - M15 Torello | 2020/12/13 10:30 | Arthur Cazaux v Robert, Quentin | 4-6,7-6,6-2 |
| ITF - M15 Torello | 2020/12/12 09:30 | Mattia Bellucci v Arthur Cazaux | 0-6,1-6 |
| ITF - M15 Torello | 2020/12/11 13:00 | Luca Nardi v Arthur Cazaux | 4-6,4-6 |
| ITF - M15 Torello | 2020/12/10 12:00 | Arthur Cazaux v Andrey Kuznetsov | 6-3,6-0 |
| ITF - M15 Torello | 2020/12/09 09:00 | Arthur Cazaux v Modica, Sacha | 6-4,6-3 |
| ITF M15 Madrid | 2020/12/03 09:00 | Facundo Diaz Acosta v Arthur Cazaux | 7-6,3-6,6-4 |
| ITF M15 Madrid | 2020/12/02 11:35 | John Echeverria v Arthur Cazaux | 7-6,2-6,4-6 |