Stadium: Court 17 Round: 27 Ground: Hardcourt outdoor
| US Open MD | 2020/09/04 18:45 | Koolhof/Nikola Mektic v Bolelli/Gonzalez | 6-4,6-3 |
| US Open MD | 2020/09/02 15:00 | Koolhof/Nikola Mektic v Cacic/Sharan | 6-4,3-6,6-3 |
| ATP New York MD | 2020/08/26 16:40 | Koolhof/Nikola Mektic v Carreno-Busta/De Minaur | 5-7,7-6,7-10 |
| ATP New York MD | 2020/08/24 18:40 | Koolhof/Nikola Mektic v Evans/Goffin | 7-5,6-1 |
| ATP New York MD | 2020/08/22 18:45 | Koolhof/Nikola Mektic v Khachanov/Rublev | 6-4,6-2 |
| ATP - Dubaï - Doubles Hommes | 2020/02/27 11:00 | Koolhof/Nikola Mektic v Klaasen R / Marach O | 5-7,4-6 |
| ATP - Dubaï - Doubles Hommes | 2020/02/25 14:35 | AL Janahi A / AL Janahi F v Koolhof/Nikola Mektic | 0-6,1-6 |
| ATP - Marseille - Doubles Hommes | 2020/02/23 10:45 | Mahut N / Pospisil V v Koolhof/Nikola Mektic | 6-3,6-4 |
| US Open MD | 2020/09/04 19:30 | Peers J / Venus M v Gille/Vliegen | 4-6,4-6 |
| US Open MD | 2020/09/02 17:15 | Gille/Vliegen v Kubot L / Melo M | 6-2,6-4 |
| ATP New York MD | 2020/08/23 20:40 | Johnson/Krajicek v Gille/Vliegen | 6-0,6-2 |
| Coupe Davis | 2020/03/07 10:55 | Balazs A / Fucsovics M v Gille/Vliegen | 6-3,1-6,4-6 |
| ATP - Acapulco - Doubles Hommes | 2020/02/28 00:00 | Cabal / Farah v Gille/Vliegen | 6-7,6-4,10-8 |
| ATP - Acapulco - Doubles Hommes | 2020/02/25 04:15 | Martinez/Reyes-Varela v Gille/Vliegen | 3-6,6-7 |
| ATP - Rio de Janeiro - Doubles Hommes | 2020/02/20 00:40 | Gille/Vliegen v Meligeni / Monteiro | 6-7,6-4,3-10 |
| ATP - Buenos Aires - Doubles Hommes | 2020/02/15 21:15 | Gille/Vliegen v Duran G / Londero J I | 6-7,4-6 |