| 2020-03-06 | Davis Cup WG2 PO: DEN vs PUR | Hard | RR | - |  Frederik Nielsen | - |  Ignacio Garcia | 7-6(5) 6-2 | H2H | 3 | - | - | - | - | - | - | - |
| 2018-02-03 | Davis Cup G2 R1: IRL vs DEN | Hard | RR | 559 | Frederik Nielsen | 840 |  Peter Bothwell | 6-1 6-1 | H2H | 3 | 64 | 4 | 2 | 46.4% | 65.4% | 60.0% | 11/12 |
| 2018-02-03 | Davis Cup G2 R1: IRL vs DEN | Hard | RR | 559 | Frederik Nielsen | 895 | Simon Carr | 6-3 7-6(2) | H2H | 3 | 89 | 4 | 3 | 56.0% | 85.1% | 43.2% | 6/7 |
| 2018-04-07 | Davis Cup G2 R2: EGY vs DEN | Hard | RR | 313 |  Karim-Mohamed Maamoun | 549 | Frederik Nielsen | 3-6 6-3 7-6(6) | H2H | 3 | 156 | 0 | 3 | 56.8% | 65.1% | 54.2% | 11/14 |
| 2017-09-15 | Davis Cup G2 R3: DEN vs RSA | Hard | RR | 230 |  Lloyd Harris | 557 | Frederik Nielsen | 6-1 1-6 6-4 6-3 | H2H | 5 | 131 | 8 | 6 | 58.5% | 78.2% | 43.6% | 4/7 |
| 2017-09-15 | Davis Cup G2 R3: DEN vs RSA | Hard | RR | 557 | Frederik Nielsen | 402 | Nicolaas Scholtz | 6-4 6-2 6-3 | H2H | 5 | 100 | 4 | 6 | 48.8% | 85.4% | 53.5% | 8/10 |
| 2017-02-03 | Davis Cup G2 R1: MAR vs DEN | - | RR | 408 | Frederik Nielsen | 861 | MARAmine Ahouda | 6-1 6-3 6-3 | H2H | 5 | 80 | 2 | 2 | 54.0% | 88.2% | 75.9% | 0/0 |
| 2017-02-03 | Davis Cup G2 R1: MAR vs DEN | - | RR | 408 | Frederik Nielsen | 682 | MARReda El Amrani | 6-2 3-6 6-3 6-4 | H2H | 5 | 127 | 12 | 5 | 64.4% | 72.4% | 59.5% | 7/8 |
| 2017-04-07 | Davis Cup G2 R2: NOR vs DEN | Hard | RR | 513 | Frederik Nielsen | 130 |  Casper Ruud | 6-4 6-2 6-3 | H2H | 5 | 104 | 1 | 5 | 73.0% | 74.1% | 55.0% | 4/5 |
| 2017-04-07 | Davis Cup G2 R2: NOR vs DEN | Hard | RR | 513 | Frederik Nielsen | 586 | Viktor Durasovic | 6-2 3-6 6-2 7-6(7) | H2H | 5 | 154 | 3 | 3 | 63.5% | 67.5% | 60.9% | 9/12 |
