Stadium: Court 8 Round: 25 Ground: Clay
| ITF M15 Bratislava | 2021/08/17 08:00 | Boris Butulija v Liska, Tomas | 3-6,1-6 |
| ITF - M15 Monastir | 2021/03/29 08:00 | Rodriguez, Lisandru v Liska, Tomas | 6-0,6-2 |
| ITF - M15 Monastir | 2021/03/28 11:30 | Ioannis Kountourakis v Liska, Tomas | 3-6,4-6 |
| ITF - M15 Monastir | 2021/03/21 15:00 | Hazem Naw v Liska, Tomas | 6-3,6-3 |
| ITF M25 Prague | 2020/09/14 09:00 | Liska, Tomas v Dalibor Svrcina | 1-6,4-6 |
| ITF M25 Prague | 2020/09/13 09:00 | Marek Gengel v Liska, Tomas | 3-6,6-3,8-10 |
| Slovakian International | 2020/07/24 10:00 | Liska, Tomas v Alex Molcan | 1-6,2-6 |
| Slovakian International | 2020/07/23 15:05 | Polasek, Filip v Liska, Tomas | 3-6,6-3,1-6 |
| ITF M15 Frederiksberg | 2021/08/03 10:05 | Prechtel, Sebastian v Karl Friberg | 6-1,6-1 |
| ITF M15 Vejle | 2021/07/30 13:00 | Ergi Kirkin v Karl Friberg | 6-3,6-0 |
| ITF M15 Vejle | 2021/07/30 07:55 | Karl Friberg v Kirkov, Vasil | 6-2,7-6 |
| ITF M15 Vejle | 2021/07/28 07:55 | Tommaso Compagnucci v Karl Friberg | 4-6,7-5,4-6 |
| ITF M15 Helsinki | 2021/06/05 07:00 | Karl Friberg v Kyrian Jacquet | 5-7,1-6 |
| ITF M15 Helsinki | 2021/06/04 10:50 | Jaimee Floyd Angele v Karl Friberg | 5-7,6-4,3-6 |
| ITF M15 Helsinki | 2021/06/03 09:30 | Cuenin, Sean v Karl Friberg | 4-6,4-6 |
| ITF M15 Helsinki | 2021/06/02 08:15 | Karl Friberg v Rodriguez, Cristian | 7-6,2-6,6-4 |