| ITF Turkey F3 | 2018/01/20 09:00 | Nikolaj Katic v Roberts Grinvalds | 0-6,4-6 |
| ITF Turkey F1 | 2018/01/07 08:30 | Zizou Bergs v Nikolaj Katic | 6-2,6-1 |
| ITF Turkey F1 | 2018/01/06 09:00 | Philipp Sikorski v Nikolaj Katic | 2-6,6-1,2-6 |
| ITF Turkey F47 Qual | 2017/12/09 06:45 | Gregorio Cordonnier v Nikolaj Katic | 6-7,6-4,6-2 |
| ITF Turkey F46 Qual | 2017/12/02 06:45 | Maurizio Speziali v Nikolaj Katic | 6-1,4-6,6-1 |
| ITF Turkey F45 Qual | 2017/11/26 06:30 | Vladislav Melnic v Nikolaj Katic | 6-4,6-2 |
| ITF Netherlands F4 | 2016/07/02 10:30 | Nikolaj Katic v Gijs Brouwer | 1-6,3-6 |
| ITF Netherlands F4 | 2016/07/02 08:00 | Nikolaj Katic v Cheraag Bajwa | 3-6,6-3,6-1 |
| ITF M15 Ystad | 2019/08/07 13:00 | Henrik Heise Korsgaard v Patrik Niklas-Salminen | 4-6,2-6 |
| ITF M15 Ystad | 2019/08/06 10:15 | Eric Ahren Moonga v Henrik Heise Korsgaard | 1-6,4-6 |
| ITF M15 Ystad | 2019/08/05 08:15 | Henrik Heise Korsgaard v Daniel Svensson | 6-2,6-1 |
| ITF Germany F8 Qual | 2015/07/19 13:00 | Henrik Heise Korsgaard v Daniel Pashayan | 7-5,6-4 |
| ITF Germany F8 Qual | 2015/07/19 08:30 | Henrik Heise Korsgaard v Adriano Quinti | 6-1,6-2 |