Stadium: Court 1 Round: 27 Ground: Hardcourt indoor
| ATP - Montpellier - Doubles Hommes | 2018/02/07 19:25 | Dodig I / Ram R v Koolhof W / Sitak A | 6-2,5-7,0-10 |
| Newport Beach, USA, Doubles | 2018/01/24 23:50 | Koolhof W / Sitak A v Huey T / Kudla D | 2-6,1-6 |
| Open d'Australie - Doubles Hommes | 2018/01/19 01:30 | Koolhof W / Sitak A v Marach O / Pavic M | 7-6,4-6,4-6 |
| Open d'Australie - Doubles Hommes | 2018/01/17 01:40 | Gojowczyk P / Mayer F v Koolhof W / Sitak A | 2-6,1-6 |
| ATP - Auckland - Doubles Hommes | 2018/01/09 08:30 | Koolhof W / Sitak A v Klaasen R / Venus M | 1-6,7-6,7-10 |
| Brisbane, Australie, Doubles | 2018/01/06 01:30 | Koolhof W / Sitak A v Mayer L / Zeballos H | 6-4,1-6,6-10 |
| Brisbane, Australie, Doubles | 2018/01/03 03:10 | Koolhof W / Sitak A v Johnson/Muller | 7-6,7-5 |
| Brisbane, Australie, Doubles | 2018/01/01 01:00 | Koolhof W / Sitak A v Huey T / Martin F | 6-3,6-2 |
| ATP - Montpellier - Doubles Hommes | 2018/02/06 18:35 | Arends S / Sancic A v Garcia-Lopez G / Marrero D | 5-7,6-2,10-8 |
| Challenger - Quimper - Doubles Hommes | 2018/02/02 11:00 | Gille/Vliegen v Arends S / Sancic A | 6-1,6-4 |
| Challenger - Quimper - Doubles Hommes | 2018/01/31 18:30 | Basic M / Setkic A v Arends S / Sancic A | 4-6,0-6 |
| Challenger Rennes MD | 2018/01/28 12:30 | Gille/Vliegen v Arends S / Sancic A | 6-3,6-7,10-7 |
| Challenger Rennes MD | 2018/01/26 11:30 | Balaji N S / Vardhan V v Arends S / Sancic A | 4-6,4-6 |
| Challenger - Koblenz - Doubles Hommes | 2018/01/21 11:00 | Arends S / Sancic A v Arneodo/Weissborn | 7-6,5-7,6-10 |
| Challenger - Koblenz - Doubles Hommes | 2018/01/20 11:30 | Arends S / Sancic A v Panfil G / Uzhylovskyi V | 6-4,3-6,11-9 |
| Challenger - Koblenz - Doubles Hommes | 2018/01/18 15:35 | Arends S / Sancic A v Kolar Z / Pavlasek A | 7-6,2-6,10-5 |