Stadium: COURT 6 Round: 27 Ground: Hardcourt outdoor
| Irving, USA, Doubles | 2018/03/14 19:00 | Inglot/Skupski v Koolhof W / Sitak A | 6-3,1-6,6-10 |
| Sao Paulo, Brazil, Doubles | 2018/03/04 17:20 | Koolhof W / Sitak A v Delbonis F / Gonzalez M | 4-6,2-6 |
| Sao Paulo, Brazil, Doubles | 2018/03/03 20:00 | Berlocq C / Kicker N v Koolhof W / Sitak A | 3-6,3-6 |
| Sao Paulo, Brazil, Doubles | 2018/02/28 20:45 | Koolhof W / Sitak A v 칼발레스 바에나 로 / 가르시아-로페즈 구 | 7-5,6-4 |
| Sao Paulo, Brazil, Doubles | 2018/02/27 23:10 | Koolhof W / Sitak A v Arends/Begemann | 6-4,7-6 |
| ATP Delray Beach MD | 2018/02/21 16:00 | Koolhof W / Sitak A v Lipsky S / Sharan D | 6-7,2-6 |
| ATP New York MD | 2018/02/18 18:00 | Koolhof W / Sitak A v Mirnyi M / Oswald P | 4-6,6-4,6-10 |
| ATP New York MD | 2018/02/18 03:05 | Koolhof W / Sitak A v 알보트 R / 바실라시빌리 N | 6-4,6-3 |
| Irving, USA, Doubles | 2018/03/13 19:15 | Fucsovics/Stakhovsky v Krajicek/Lacko | 4-6,4-6 |