Stadium: Center Court Round: 25 Ground: Clay
| ATP Hamburg | 2018/07/25 13:20 | Rudolf Molleker v Jozef Kovalik | 4-6,0-6 |
| Challenger Prague | 2023/05/09 08:00 | Norbert Gombos v Rudolf Molleker | 6-4,6-4 |
| Challenger Prague | 2023/05/08 11:05 | Vitaliy Sachko v Rudolf Molleker | 4-6,2-6 |
| Challenger Prague Qual | 2023/05/07 15:15 | Grigoriy Lomakin v Rudolf Molleker | 3-6,3-6 |
| Challenger Prague | 2023/05/01 08:30 | Jan Choinski v Rudolf Molleker | 6-0,6-3 |
| Challenger Prague | 2023/04/30 08:00 | Rudolf Molleker v Alexandar Lazarov | 7-5,4-6,7-6 |
| Challenger Ostrava | 2023/04/25 11:00 | Rudolf Molleker v Dalibor Svrcina | 0-6,6-2,1-6 |
| Challenger Ostrava | 2023/04/24 09:50 | Rudolf Molleker v Filip Peliwo | 6-2,6-1 |
| Challenger Ostrava | 2023/04/23 13:10 | Rudolf Molleker v Petr Nouza | 7-6,2-6,7-6 |
| ATP Rome | 2023/05/08 10:15 | Daniel Altmaier v Jozef Kovalik | 6-2,6-4 |
| Challenger Cagliari | 2023/05/04 08:00 | Jozef Kovalik v Laslo Djere | 4-6,2-6 |
| Challenger Cagliari | 2023/05/03 09:00 | Steven Diez v Jozef Kovalik | 6-7,4-6 |
| ATP Madrid | 2023/04/24 08:00 | Jozef Kovalik v Giulio Zeppieri | 4-6,6-4,4-6 |
| ATP Barcelona | 2023/04/19 09:00 | Denis Shapovalov v Jozef Kovalik | 6-4,6-3 |
| ATP Barcelona | 2023/04/17 14:05 | Pedro Martinez v Jozef Kovalik | 5-7,6-2,5-7 |
| ATP Barcelona | 2023/04/16 15:10 | Pol Martin Tiffon v Jozef Kovalik | 3-6,7-5,2-6 |
| ATP Barcelona | 2023/04/15 15:40 | Marek Gengel v Jozef Kovalik | 3-6,2-6 |