| Challenger Wroclaw | 02/17 15:25 | 25 | 크라브축, 콘스탄틴 v Nielsen, Frederik | 6-7,6-2,6-3 | |
| Challenger Wroclaw Qual | 02/16 11:00 | 44 | 엘긴, 미카일 v Nielsen, Frederik | 3-6,6-3,6-7 | |
| ITF USA F4 | 01/18 19:00 | - | Nielsen, Frederik v 가란간가, 타카니 | 7-6,3-6,4-6 | |
| ITF USA F4 | 01/17 19:00 | - | Nielsen, Frederik v 사르키시안, 알렉산더 | 3-6,6-4,6-3 | |
| ITF USA F4 | 01/16 18:00 | - | 코즐로브, 스테판 v Nielsen, Frederik | 6-7,6-4,0-6 | |
| ITF USA F4 | 01/15 18:00 | - | 맥도날드, 맥켄지 v Nielsen, Frederik | 6-7,4-6 | |
| ITF USA F4 | 01/13 20:30 | - | 레들리키, 마르틴 v Nielsen, Frederik | 4-6,4-6 | |
| ITF USA F2 | 01/08 19:00 | - | Quigley, Eric v Nielsen, Frederik | 2-6,2-6 | |
| ITF USA F2 | 01/07 18:00 | - | 쿠이로즈, 로베르토 v Nielsen, Frederik | 2-6,5-7 | |
| Knoxville, USA, Qualifying | 11/04 15:00 | 44 | Nielsen, Frederik v 반고우라, 세코우 | 4-6,6-7 | |
| Challenger Charlottesville | 10/30 15:00 | 26 | Nielsen, Frederik v 쿠들라, 다니스 | 1-6,6-3,3-6 | |
| Charlottesville, USA, Qualifying | 10/27 15:35 | 44 | Willis, Marcus v Nielsen, Frederik | 2-6,2-6 | |
| ITF Canada F8 | 08/22 17:00 | - | Nielsen, Frederik v 크루에겔, 미트첼 | 4-6,6-7 | |
| Canada F7, Singles | 08/15 20:40 | - | 프라탄젤로, 비오른 v Nielsen, Frederik | 6-4,6-4 | |
| Canada F7, Singles | 08/14 16:00 | - | Nielsen, Frederik v Gabb, Richard | Retired | |
| Canada F7, Singles | 08/12 18:30 | - | Bambridge, Luke v Nielsen, Frederik | 6-7,6-7 | |
| ITF Ireland F1 | 07/22 10:25 | - | Borg, Stefan v Nielsen, Frederik | 3-6,2-6 | |
| ATP Newport Qual | 07/05 16:40 | 46 | 파비치, 앤트 v Nielsen, Frederik | 6-3,6-2 | |
| ITF Spain F14 | 06/19 16:00 | - | Hernando Ruano, Jorge v Nielsen, Frederik | 6-3,6-4 | |
| ITF Spain F14 | 06/17 16:00 | - | Cortes Alcaraz, Aaron v Nielsen, Frederik | Retired | |
| ITF Spain F13 | 06/15 09:30 | - | 베가 헤르난데스, 데이비드 v Nielsen, Frederik | 3-6,2-6 | |
| ITF Spain F13 | 06/14 14:55 | - | Nielsen, Frederik v 페레즈 산즈, 다비드 | 6-4,6-1 | |
| ITF Spain F13 | 06/13 15:00 | - | Nielsen, Frederik v 플라 말페이토, 자우메 | 7-5,6-3 | |
| ITF Spain F13 | 06/12 16:55 | - | Villacorta-Alonso, Ricardo v Nielsen, Frederik | 1-6,6-3,1-6 | |
| ITF Korea F1 | 04/25 06:45 | - | Nielsen, Frederik v Zhyrmont, Dzmitry | 5-7,6-7 | |
| ITF Korea F1 | 04/24 02:45 | - | Gabb, Richard v Nielsen, Frederik | 1-6,6-3,1-6 | |
| 파이널, 플레이오프 | 04/06 11:00 | 1 | Nielsen, Frederik v 나스타시, 우고 | 6-4,3-6,6-2 | |
| ITF Switzerland F1 | 03/20 11:00 | - | Nielsen, Frederik v 라크소넨, 헨리 | 6-7,5-7 | |
| ITF Switzerland F1 | 03/18 11:00 | - | 고메즈, 주안 세바스티안 v Nielsen, Frederik | 5-7,5-7 |