Challenger Sophia Antipolis MD 04/03 15:00 26 Koolhof/Middelkoop v Skupski/Skupski 6-1,7-6
Challenger Irving MD 03/15 21:40 26 Koolhof/Middelkoop v Erlich/Lipsky 2-6,5-7
ATP Dubai Qual MD 02/25 17:00 - Koolhof/Middelkoop v Nedunchezhiyan/Seppi 1-6,6-4,0-0
ATP - Marseille - Herredouble 02/23 11:00 27 Koolhof/Middelkoop v Chardy/Eysseric 6-7,4-6
ATP - Marseille - Herredouble 02/22 11:00 26 Koolhof/Middelkoop v Brunstrom/Siljestrom 6-3,7-6
ATP - Rotterdam - Herredouble 02/19 12:00 29 Dodig/Granollers v Koolhof/Middelkoop 7-6,6-3
ATP - Rotterdam - Herredouble 02/18 12:00 28 Koolhof/Middelkoop v Rojer/Tecau 6-4,6-3
ATP - Rotterdam - Herredouble 02/17 10:00 27 Koolhof/Middelkoop v Kubot/Melo 7-6,6-3
ATP - Rotterdam - Herredouble 02/14 14:45 26 Zverev/Zverev v Koolhof/Middelkoop 3-6,4-6
ATP - Sofia - Herredouble 02/07 13:00 26 Skupski/Skupski v Koolhof/Middelkoop 6-7,6-4,10-7
Australian Open 2017 MD 01/20 00:00 25 Rojer/Tecau v Koolhof/Middelkoop 6-3,6-4
Australian Open 2017 MD 01/18 05:45 24 Koolhof/Middelkoop v Peralta/Zeballos 6-4,6-2
ATP - Sydney - Herredouble 01/14 05:00 29 Murray/Soares v Koolhof/Middelkoop 3-6,5-7
ATP - Sydney - Herredouble 01/13 04:20 28 Koolhof/Middelkoop v Pavic/Peya 6-3,3-6,10-8
ATP - Sydney - Herredouble 01/12 04:00 27 Koolhof/Middelkoop v Rojer/Tecau 7-6,2-6,11-9
ATP - Sydney - Herredouble 01/11 00:00 26 Marach/Martin v Koolhof/Middelkoop Retired
ATP Chennai MD 01/02 14:40 26 Koolhof/Middelkoop v Duran/Molteni 6-7,4-6
Lotto NK Tennis - Herredouble 12/17 18:00 - Koolhof/Middelkoop v de Boer/Van De Zandschulp 6-7,6-3,0-0
Challenger Brescia MD 11/19 15:40 29 Koolhof/Middelkoop v Elgin/Kudryavtsev 6-7,3-6
Challenger Brescia MD 11/18 13:55 28 Koolhof/Middelkoop v Cerretani/Oswald 6-1,6-4
Challenger - Ortisei 11/08 13:30 26 Elgin/Istomin v Koolhof/Middelkoop 7-6,6-2
Challenger - Eckental - Herredouble 11/03 09:00 26 Koolhof/Middelkoop v Djere/Setkic Walkover
Challenger Budapest MD 10/26 15:00 27 Koolhof/Middelkoop v Molchanov/Zelenay 6-7,2-6
ATP - Moskva - Herredouble 10/18 13:10 26 Kravchuk/Kuznetsov v Koolhof/Middelkoop 7-5,3-6,10-6
ATP - St Petersborg - Herredouble 09/20 16:15 26 Koolhof/Middelkoop v Kravchuk/Kuznetsov 7-5,4-6,5-10
Challenger Alphen MD 09/07 15:00 26 Koolhof/Middelkoop v Mies/Otte 6-1,2-6,6-10
US Open 2016 MD 08/31 17:00 24 Koolhof/Middelkoop v Carreno-Busta/Lopez 4-6,6-3,6-7
ATP - Kitzbühel - Herredouble 07/23 09:00 29 Koolhof/Middelkoop v Novak/Thiem 2-6,6-3,11-9
ATP - Kitzbühel - Herredouble 07/22 16:25 28 Koolhof/Middelkoop v Cerretani/Oswald 6-3,6-7,10-3
ATP - Kitzbühel - Herredouble 07/21 17:10 27 Koolhof/Middelkoop v Kretschmer/Struff 7-5,1-6,10-8