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