Stadium: ard Court 4H Round: 62 Ground: Hardcourt outdoor
| ITF Turkey F1 | 2018/01/07 08:30 | Zizou Bergs v Katic, Nikolaj | 6-2,6-1 |
| ITF Turkey F1 | 2018/01/06 09:00 | Sikorski, Philipp v Katic, Nikolaj | 2-6,6-1,2-6 |
| ITF Turkey F47 Qual | 2017/12/09 06:45 | Cordonnier, Gregorio v Katic, Nikolaj | 6-7,6-4,6-2 |
| ITF Turkey F46 Qual | 2017/12/02 06:45 | Speziali, Maurizio v Katic, Nikolaj | 6-1,4-6,6-1 |
| ITF Turkey F45 Qual | 2017/11/26 06:30 | Melnic, Vladislav v Katic, Nikolaj | 6-4,6-2 |
| ITF Netherlands F4 | 2016/07/02 10:30 | Katic, Nikolaj v Gijs Brouwer | 1-6,3-6 |
| ITF Netherlands F4 | 2016/07/02 08:00 | Katic, Nikolaj v Cheraag Bajwa | 3-6,6-3,6-1 |
| ITF Czech Republic F4 Qual | 2016/06/26 08:00 | Vit Kopriva v Katic, Nikolaj | 6-0,6-1 |
| ITF Estonia F4 | 2017/11/04 14:00 | Daniil Glinka v Grinvalds, Roberts | 6-7,6-4,6-3 |
| ITF Estonia F3 | 2017/10/28 09:30 | Filin, Pavel v Grinvalds, Roberts | 6-3,6-1 |
| ITF Estonia F2 | 2017/10/21 11:00 | Stoute, Isaac v Grinvalds, Roberts | 7-6,4-6,6-2 |
| ITF Latvia F1 | 2017/08/02 14:55 | Grinvalds, Roberts v Dijkhuizen, Marc | 1-6,4-6 |
| ITF Latvia F1 | 2017/07/31 07:00 | Martins Rocens v Grinvalds, Roberts | 3-6,6-7 |
| ITF Latvia F1 | 2017/07/29 11:30 | Radionov, Motvey v Grinvalds, Roberts | 5-7,1-6 |
| ITF Israel F18 | 2016/12/10 07:30 | Elbaz, Shahar v Grinvalds, Roberts | 6-3,6-4 |
| ITF Israel F17 | 2016/12/04 07:30 | Grinvalds, Roberts v Radinski, Aljaz | 5-7,6-4,5-7 |