Round: 26 Ground: Hardcourt outdoor
| ITF Spain F17 | 2017/06/13 19:40 | Nielsen, Frederik v Alastair Gray | 6-2,6-4 |
| Challenger Busan Qual | 2017/05/14 03:10 | Krajicek, Austin v Nielsen, Frederik | 6-3,6-2 |
| Challenger Busan Qual | 2017/05/13 03:45 | Mousley, Bradley v Nielsen, Frederik | 4-6,3-6 |
| Challenger Seoul Qual | 2017/05/06 01:00 | Nielsen, Frederik v Felix Auger Aliassime | 1-6,4-6 |
| Challenger Gimcheon Qual | 2017/04/29 05:15 | Glasspool, Lloyd v Nielsen, Frederik | 6-7,6-2,6-2 |
| Coupe Davis | 2017/04/09 10:00 | Casper Ruud v Nielsen, Frederik | 4-6,2-6,3-6 |
| Coupe Davis | 2017/04/07 16:15 | Viktor Durasovic v Nielsen, Frederik | 2-6,6-3,2-6,6-7 |
| Challenger St Brieuc Qual | 2017/03/27 14:35 | Nielsen, Frederik v Egor Gerasimov | 7-6,2-6,0-6 |
| ITF Spain F17 | 2017/06/13 14:00 | Alberto Barroso Campos v Crepaldi, Erik | 6-4,6-0 |
| ITF Spain F17 | 2017/06/12 09:00 | Alberto Barroso Campos v Vila Antuna, Axel | 6-0,6-4 |
| ITF Spain F17 | 2017/06/11 16:00 | Alberto Barroso Campos v Le Gal Perez, Diego | 6-1,6-0 |
| ITF Spain F16 | 2017/06/05 15:00 | Carlos Taberner v Alberto Barroso Campos | 6-2,6-2 |
| ITF Spain F16 Qual | 2017/06/04 15:00 | Alberto Barroso Campos v Blanco Damea, Alvaro | 6-0,6-1 |
| ITF USA F37 | 2016/11/16 18:00 | Smith, Austin v Alberto Barroso Campos | 1-6,6-1,7-6 |
| ITF USA F37 | 2016/11/14 16:00 | Alberto Barroso Campos v Rakic, Strahinja | 3-6,3-6 |
| ITF USA F37 | 2016/11/12 18:30 | Alberto Barroso Campos v Scott, Fletcher | 6-0,6-3 |