Stadium: Match Court Round: 168
| ATP Paris MD | 2021/11/01 11:50 | Martin F / Mies A v Koolhof/Jean-Julien Rojer | 6-3,7-5 |
| ATP Vienna MD | 2021/10/26 17:55 | Cabal / Farah v Koolhof/Jean-Julien Rojer | 4-6,6-3,10-8 |
| ATP Antwerp MD | 2021/10/24 12:00 | Koolhof/Jean-Julien Rojer v Mahut/Martin | 0-6,1-6 |
| ATP Antwerp MD | 2021/10/23 17:10 | Harris/Malisse v Koolhof/Jean-Julien Rojer | 4-6,2-6 |
| ATP Antwerp MD | 2021/10/20 12:20 | Koolhof/Jean-Julien Rojer v Jebavy R / Vasilevski A | 6-4,6-2 |
| ATP Indian Wells - Doubles Hommes | 2021/10/12 21:35 | Koolhof/Jean-Julien Rojer v Peers/Polasek | 4-6,6-7 |
| ATP Indian Wells - Doubles Hommes | 2021/10/10 18:00 | Koolhof/Jean-Julien Rojer v Krajicek/Mies | 1-6,7-6,10-5 |
| US Open MD | 2021/09/06 20:20 | Peers/Polasek v Koolhof/Jean-Julien Rojer | 4-6,6-3,6-4 |