Stadium: Stadium Round: 26 Ground: Hardcourt outdoor
| ATP Brisbane MD | 2018/01/06 01:30 | Koolhof/Sitak v Mayer/Zeballos | 6-4,1-6,6-10 |
| ATP Brisbane MD | 2018/01/03 03:10 | Koolhof/Sitak v Johnson/Muller | 7-6,7-5 |
| ATP Brisbane MD | 2018/01/01 01:00 | Koolhof/Sitak v Huey/Martin | 6-3,6-2 |
| Challenger Mouilleron le Captif MD | 2017/11/11 12:00 | Koolhof/Sitak v Bednarek/Pel | 6-4,6-7,10-12 |
| Challenger Mouilleron le Captif MD | 2017/11/09 14:00 | Koolhof/Sitak v Bury/Siljestrom | 6-2,6-1 |
| Challenger Brest MD | 2017/10/24 11:00 | Koolhof/Sitak v Chardy/Giannessi | 5-7,4-6 |
| ATP Antwerp MD | 2017/10/21 09:00 | Gonzalez/Peralta v Koolhof/Sitak | 7-5,6-3 |
| ATP Antwerp MD | 2017/10/18 16:35 | Martin/Roger-Vasselin v Koolhof/Sitak | 4-6,6-7 |