Stadium: Next Gen Court Round: 26 Ground: Hardcourt indoor
| Open de France - Doubles Hommes | 2020/10/08 12:05 | Koolhof/Nikola Mektic v Krawietz K / Mies A | 3-6,5-7 |
| Open de France - Doubles Hommes | 2020/10/06 15:20 | Koolhof/Nikola Mektic v Monroe/Paul | 6-4,6-4 |
| Open de France - Doubles Hommes | 2020/10/04 17:10 | Herbert P-H / Mahut N v Koolhof/Nikola Mektic | 2-6,6-7 |
| Open de France - Doubles Hommes | 2020/10/02 12:10 | Mayer/Pella v Koolhof/Nikola Mektic | 6-7,3-6 |
| Open de France - Doubles Hommes | 2020/09/30 17:45 | Bambridge L / Mclachlan B v Koolhof/Nikola Mektic | 4-6,6-7 |
| ATP Hamburg MD | 2020/09/25 14:30 | Dodig/Pavic v Koolhof/Nikola Mektic | 6-4,6-4 |
| ATP Hamburg MD | 2020/09/24 08:30 | Krawietz K / Mies A v Koolhof/Nikola Mektic | 3-6,5-7 |
| ATP Hamburg MD | 2020/09/22 11:35 | Koolhof/Nikola Mektic v Ram/Salisbury | 6-4,6-7,12-10 |