Stadium: Centre Court 1 Round: 28 Ground: Clay
| ATP Sao Paulo MD | 2018/02/28 18:55 | Bernardi/Monteiro v Berlocq/Kicker | 3-6,4-6 |
| ATP Sao Paulo MD | 2018/02/28 20:45 | Koolhof/Sitak v C Baena/Garcia-Lopez | 7-5,6-4 |
| ATP Sao Paulo MD | 2018/02/27 23:10 | Koolhof/Sitak v Arends/Begemann | 6-4,7-6 |
| ATP Delray Beach - MD | 2018/02/21 16:00 | Koolhof/Sitak v Lipsky/Sharan | 6-7,2-6 |
| ATP Nowy Jork - MD | 2018/02/18 18:00 | Koolhof/Sitak v Mirnyi/Oswald | 4-6,6-4,6-10 |
| ATP Nowy Jork - MD | 2018/02/18 03:05 | Koolhof/Sitak v Albot/Basilashvili | 6-4,6-3 |
| ATP Nowy Jork - MD | 2018/02/16 22:30 | Chardy/Martin v Koolhof/Sitak | 4-6,6-3,6-10 |
| ATP Nowy Jork - MD | 2018/02/14 18:00 | Koolhof/Sitak v Nestor/Skupski | 6-3,6-1 |
| ATP Montpellier - MD | 2018/02/08 13:45 | Koolhof/Sitak v Arends/Sancic | 6-3,4-6,5-10 |