| 2024-02-03 | Davis Cup WG1 PO: GRE vs ROU | Hard | RR | 10 |  Stefanos Tsitsipas | 283 |  Marius Copil | 6-3 6-4 | H2H | 3 | 77 | 6 | 2 | 50.0% | 83.3% | 66.7% | 3/3 |
| 2022-09-26 | Tel Aviv | Hard | R32 | 58 |  Arthur Rinderknech | 350 | Marius Copil (Q) | 6-7(5) 6-4 6-3 | H2H | 3 | 140 | 15 | 1 | 75.8% | 77.3% | 62.5% | 2/2 |
| 2022-09-16 | Davis Cup WG1 R1: SVK vs ROU | Clay | RR | 45 |  Alex Molcan | 347 | Marius Copil | 7-5 6-1 | H2H | 3 | - | - | - | - | - | - | - |
| 2022-03-04 | Davis Cup QLS R1: ESP vs ROU | Clay | RR | 19 |  Carlos Alcaraz | 261 | Marius Copil | 6-4 6-3 | H2H | 3 | 92 | 1 | 1 | 66.7% | 75.0% | 65.0% | 2/2 |
| 2022-03-04 | Davis Cup QLS R1: ESP vs ROU | Clay | RR | 15 | Roberto Bautista Agut | 261 | Marius Copil | 6-2 6-3 | H2H | 3 | 88 | 1 | 0 | 57.4% | 77.8% | 85.0% | 2/2 |
| 2021-09-18 | Davis Cup WG1 R1: POR vs ROU | Hard | RR | 250 | Marius Copil | 215 |  Gastao Elias | 6-4 6-3 | H2H | 3 | 81 | 11 | 2 | 56.8% | 96.0% | 68.4% | 1/1 |
| 2021-09-18 | Davis Cup WG1 R1: POR vs ROU | Hard | RR | 250 | Marius Copil | 150 | Joao Sousa | 6-3 2-6 6-4 | H2H | 3 | 104 | 10 | 3 | 61.3% | 69.6% | 65.5% | 0/2 |
| 2019-10-21 | Basel | Hard | R32 | 10 | Roberto Bautista Agut (4) | 82 | Marius Copil (WC) | 6-4 7-5 | H2H | 3 | 94 | 2 | 4 | 70.8% | 80.4% | 47.4% | 1/1 |
| 2019-10-14 | Antwerp | Hard | R16 | 92 | Marius Copil (Q) | 15 |  Diego Schwartzman (3) | 6-4 5-7 7-6(7) | H2H | 3 | 161 | 13 | 4 | 57.1% | 76.6% | 45.8% | 4/8 |
| 2019-10-14 | Antwerp | Hard | R32 | 92 | Marius Copil (Q) | 77 | Federico Delbonis | 6-4 7-6(3) | H2H | 3 | 87 | 9 | 0 | 65.5% | 81.6% | 60.0% | 0/2 |
