Stadium: Holbæk Sportsby Round: 45 Ground: Hardcourt indoor
| ATP New York | 2020/02/09 20:30 | Go Soeda v Frederik Nielsen | 6-1,6-2 |
| Challenger Phoenix | 2019/03/13 18:40 | Frederik Nielsen v Peter Polansky | 6-7,3-6 |
| Challenger Phoenix | 2019/03/11 17:00 | Frederik Nielsen v Fabrice Martin | 6-4,7-6 |
| Challenger Noumea | 2018/12/31 04:05 | Daniel Masur v Frederik Nielsen | 6-1,5-7,6-4 |
| Challenger Fairfield | 2018/10/08 17:00 | Kevin King v Frederik Nielsen | 6-4,6-3 |
| Challenger Fairfield | 2018/10/07 18:15 | Thai-Son Kwiatkowski v Frederik Nielsen | 7-6,3-6,5-7 |
| Challenger Fairfield | 2018/10/06 22:15 | Frederik Nielsen v Roberto Ortega-Olmedo | 6-2,6-2 |
| Challenger Stockton | 2018/09/29 23:05 | Alexander Ritschard v Frederik Nielsen | 6-4,7-6 |
| Davis Cup | 2020/03/06 16:50 | Holger Rune v Ignacio Garcia | 4-6,6-3,6-0 |
| Davis Cup | 2019/06/22 15:00 | Ignacio Garcia v Maykol Ponte Suarez | 6-2,6-3 |
| Davis Cup | 2019/06/21 15:00 | Philip Wilbert Major v Ignacio Garcia | 0-6,3-6 |
| Davis Cup | 2019/06/20 15:00 | Ignacio Garcia v Kyle Joseph | 6-0,6-2 |
| Davis Cup | 2019/06/18 15:00 | Ignacio Garcia v Tomas Del Olmo | 6-1,6-0 |
| ITF USA F30 | 2018/11/03 16:00 | Peter Bertran v Ignacio Garcia | 6-3,6-1 |
| Davis Cup | 2018/02/04 20:45 | Luis Patino v Ignacio Garcia | 7-5,6-2 |
| Davis Cup | 2018/02/03 19:00 | Manuel Sanchez v Ignacio Garcia | 7-6,6-4 |