Stadium: Center Court Round: 26 Ground: Carpet indoor
| Atlanta, USA | 2018/07/23 19:40 | Lacko, Lukas v Gunneswaran, Prajnesh | 6-2,6-2 |
| Challenger Ismaning | 2020/10/19 12:30 | Gunneswaran, Prajnesh v Tomas Martin Etcheverry | 6-4,3-6,7-6 |
| Parma II, Italy | 2020/10/05 10:40 | Gunneswaran, Prajnesh v Lorenzi, Paolo | 6-7,2-6 |
| Challenger Biella | 2020/09/28 10:00 | Maxime Cressy v Gunneswaran, Prajnesh | 7-6,6-4 |
| Open de France | 2020/09/23 12:55 | Aleksandar Vukic v Gunneswaran, Prajnesh | 6-4,7-6 |
| Open de France | 2020/09/21 10:10 | Cem Ilkel v Gunneswaran, Prajnesh | 3-6,1-6 |
| Kitzbuhel, Austria | 2020/09/08 10:00 | Marc-Andrea Huesler v Gunneswaran, Prajnesh | 6-3,6-3 |
| Kitzbuhel, Austria | 2020/09/07 12:50 | Sandro Kopp v Gunneswaran, Prajnesh | 4-6,6-1,4-6 |
| Coupe Davis | 2020/03/06 14:00 | Gojo, Borna v Gunneswaran, Prajnesh | 3-6,6-4,6-2 |
| 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 |
| Open de France | 2020/09/21 08:00 | Lacko, Lukas v Oscar Otte | 6-4,1-6,2-6 |
| Challenger - Ostrava | 2020/09/04 11:45 | Botic Van De Zandschulp v Lacko, Lukas | 5-7,6-3,6-1 |
| Challenger - Ostrava | 2020/09/03 08:00 | Lacko, Lukas v Frederico Ferreira Silva | 6-4,7-5 |
| Challenger - Ostrava | 2020/08/31 08:00 | Lacko, Lukas v Horansky, Filip | 7-6,6-2 |
| Challenger Trieste | 2020/08/24 08:00 | Juan Pablo Ficovich v Lacko, Lukas | 7-5,7-5 |
| Challenger - Pau | 2020/02/27 11:00 | Lacko, Lukas v Quentin Halys | 6-7,2-6 |