| 2024-01-01 | United Cup | Hard | RR | 19 |  Nicolas Jarry | 314 |  Steven Diez | 7-5 6-4 | H2H | 3 | 118 | 6 | 0 | 65.5% | 86.1% | 73.7% | 0/0 |
| 2024-01-01 | United Cup | Hard | RR | 6 |  Stefanos Tsitsipas | 314 | Steven Diez | 6-2 6-3 | H2H | 3 | 77 | 6 | 2 | 60.8% | 90.3% | 45.0% | 1/1 |
| 2022-04-04 | Houston | Clay | R32 | 83 |  Jordan Thompson | 292 | Steven Diez (LL) | 6-3 6-2 | H2H | 3 | 94 | 4 | 1 | 67.3% | 84.8% | 68.8% | 1/1 |
| 2022-03-04 | Davis Cup QLS R1: CAN vs NED | Clay | RR | 255 |  Robin Haase | 294 | Steven Diez | 6-1 6-2 | H2H | 3 | 55 | 3 | 2 | 54.3% | 80.0% | 57.1% | 0/0 |
| 2022-03-04 | Davis Cup QLS R1: CAN vs NED | Clay | RR | 54 | Tallon Griekspoor | 294 | Steven Diez | 6-4 6-4 | H2H | 3 | 96 | 2 | 3 | 59.3% | 78.1% | 59.1% | 1/2 |
| 2021-11-25 | Davis Cup Finals RR: CAN vs SWE | Hard | RR | 171 |  Elias Ymer | 264 | Steven Diez | 6-4 6-2 | H2H | 3 | 86 | 3 | 5 | 58.3% | 82.1% | 40.0% | 1/3 |
| 2020-09-28 | Roland Garros | Clay | R128 | 236 |  Mackenzie McDonald | 181 | Steven Diez (Q) | 4-6 6-3 6-3 6-4 | H2H | 5 | 168 | 11 | 2 | 68.1% | 67.5% | 58.3% | 4/8 |
| 2019-05-20 | Lyon | Clay | R16 | 85 |  Jo-Wilfried Tsonga (PR) | 262 | Steven Diez (Q) | 3-6 7-6(2) 6-3 | H2H | 3 | 162 | 8 | 8 | 62.7% | 79.7% | 39.0% | 12/15 |
| 2019-05-20 | Lyon | Clay | R32 | 262 | Steven Diez (Q) | 82 | Bernard Tomic | 6-4 4-1 RET | H2H | 3 | 69 | 1 | 0 | 66.7% | 65.4% | 69.2% | 3/5 |
| 2017-04-24 | Barcelona | Clay | R64 | 57 |  Nicolas Almagro | 176 | Steven Diez (Q) | 6-3 6-4 | H2H | 3 | 84 | 8 | 3 | 48.1% | 80.8% | 50.0% | 1/3 |
