Stadium: Stadium 9 Round: 25 Ground: Hardcourt outdoor
| US Open - MD | 2021/09/06 20:20 | Peers/Polasek v Koolhof/Rojer | 4-6,6-3,6-4 |
| US Open - MD | 2021/09/04 15:00 | Galloway/Lawson v Koolhof/Rojer | 3-6,6-7 |
| US Open - MD | 2021/09/03 17:00 | Karatsev/Nedovyesov v Koolhof/Rojer | 6-7,1-6 |
| Olimpiada 2020 - MD | 2021/07/24 02:00 | Koolhof/Rojer v Gille/Vliegen | 6-3,7-6 |
| Wimbledon - MD | 2021/07/01 17:00 | Koolhof/Rojer v Glasspool/Heliovaara | 7-5,3-6,4-6 |
| ATP Halle - MD | 2021/06/17 10:35 | Koolhof/Rojer v Auger Aliassime/Hurkacz | 6-7,3-6 |
| French Open - MD | 2021/06/05 12:25 | Koolhof/Rojer v Bublik/Golubev | 6-7,6-3,4-6 |
| French Open - MD | 2021/06/04 11:25 | Koolhof/Rojer v Koepfer/Ruusuvuori | 6-4,7-6 |
| ATP San Diego - MD | 2021/10/01 20:00 | Krajicek/Mies v Arevalo/Delbonis | 1-6,6-3,5-10 |
| ATP San Diego - MD | 2021/09/28 21:55 | Krajicek/Mies v Evans/Fognini | 6-1,3-6,10-7 |