Stadium: Court 1 Round: 27 Ground: Hardcourt indoor
| ATP Montpellier MD | 2018/02/07 19:25 | Dodig/Ram v Koolhof/Sitak | 6-2,5-7,0-10 |
| Challenger Newport Beach MD | 2018/01/24 23:50 | Koolhof/Sitak v Huey/Kudla | 2-6,1-6 |
| Australian Open MD | 2018/01/19 01:30 | Koolhof/Sitak v Marach/Pavic | 7-6,4-6,4-6 |
| Australian Open MD | 2018/01/17 01:40 | Gojowczyk/Mayer v Koolhof/Sitak | 2-6,1-6 |
| ATP Auckland MD | 2018/01/09 08:30 | Koolhof/Sitak v Klaasen/Venus | 1-6,7-6,7-10 |
| 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 |
| ATP Montpellier MD | 2018/02/06 18:35 | Arends/Sancic v Garcia-Lopez/Marrero | 5-7,6-2,10-8 |
| Challenger Quimper MD | 2018/02/02 11:00 | Gille/Vliegen v Arends/Sancic | 6-1,6-4 |
| Challenger Quimper MD | 2018/01/31 18:30 | Basic/Setkic v Arends/Sancic | 4-6,0-6 |
| Challenger Rennes MD | 2018/01/28 12:30 | Gille/Vliegen v Arends/Sancic | 6-3,6-7,10-7 |
| Challenger Rennes MD | 2018/01/26 11:30 | Balaji/Vardhan v Arends/Sancic | 4-6,4-6 |
| Challenger Koblenz MD | 2018/01/21 11:00 | Arends/Sancic v Arneodo/Weissborn | 7-6,5-7,6-10 |
| Challenger Koblenz MD | 2018/01/20 11:30 | Arends/Sancic v Panfil/Uzhylovskyi | 6-4,3-6,11-9 |
| Challenger Koblenz MD | 2018/01/18 15:35 | Arends/Sancic v Kolar/Pavlasek | 7-6,2-6,10-5 |