 World: Davis Cup - World Group - Doubles - Play Offs |
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| | Bolelli S./Vavassori A. | Koolhof W./Van De Zandschulp B. | CAN. | details | 24.11.2024 |
| | Krawietz K./Puetz T. | Koolhof W./Van De Zandschulp B. | CAN. | details | 22.11.2024 |
| | Koolhof W./Van De Zandschulp B. | Alcaraz C./Granollers M. | 2:0 (7:64, 7:63) | details | 19.11.2024 |
| World: Finals - Turin - Doubles - Main |
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| Group B | Koolhof W./Mektic N. | Heliovaara H./Patten H. | 1:2 (6:4, 3:6, 10:12) | details | 14.11.2024 |
| Group B | Granollers M./Zeballos H. | Koolhof W./Mektic N. | 1:2 (6:4, 66:7, 8:10) | details | 12.11.2024 |
| Group B | Koolhof W./Mektic N. | Purcell M./Thompson J. | 0:2 (61:7, 3:6) | details | 10.11.2024 |
 France: Paris - Doubles - Main |
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| Final | Koolhof W./Mektic N. | Glasspool L./Pavlasek A. | 2:1 (3:6, 6:3, 10:5) | details | 03.11.2024 |
| Semi-finals | Skupski N./Venus M. | Koolhof W./Mektic N. | 0:2 (2:6, 4:6) | details | 02.11.2024 |
| Quarter-finals | Bopanna R./Ebden M. | Koolhof W./Mektic N. | 0:2 (613:7, 5:7) | details | 01.11.2024 |
| 1/8-finals | Fils A./Mpetshi Perricard G. | Koolhof W./Mektic N. | WO. | details | 31.10.2024 |
 Switzerland: Basel - Doubles - Main |
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| Final | Koolhof W./Mektic N. | Murray J./Peers J. | 0:2 (3:6, 5:7) | details | 27.10.2024 |
| Semi-finals | Koolhof W./Mektic N. | Huesler M./Stricker D. | 2:1 (6:4, 61:7, 10:6) | details | 26.10.2024 |
| Quarter-finals | Koolhof W./Mektic N. | Krawietz K./Nedovyesov A. | 2:0 (6:4, 7:65) | details | 24.10.2024 |
| 1/8-finals | Koolhof W./Mektic N. | Cerundolo F./Etcheverry T. M. | 2:1 (6:4, 69:7, 10:7) | details | 21.10.2024 |
 China: Shanghai - Doubles - Main |
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| Final | Gonzalez M./Molteni A. | Koolhof W./Mektic N. | 0:2 (4:6, 4:6) | details | 13.10.2024 |
| Semi-finals | Gonzalez S./Roger-Vasselin E. | Koolhof W./Mektic N. | 1:2 (7:63, 4:6, 6:10) | details | 11.10.2024 |
| Quarter-finals | Koolhof W./Mektic N. | Lammons N./Withrow J. | 2:0 (6:3, 6:4) | details | 10.10.2024 |
| 1/8-finals | Bopanna R./Dodig I. | Koolhof W./Mektic N. | 1:2 (65:7, 6:2, 12:14) | details | 08.10.2024 |
| 1/16-finals | Koolhof W./Mektic N. | Fils A./Shelton B. | 2:1 (6:3, 3:6, 10:4) | details | 05.10.2024 |
| China: Beijing - Doubles - Main |
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| Semi-finals | Bolelli S./Vavassori A. | Koolhof W./Mektic N. | 2:0 (7:61, 6:2) | details | 01.10.2024 |
| Quarter-finals | Cobolli F./Musetti L. | Koolhof W./Mektic N. | 0:2 (4:6, 5:7) | details | 29.09.2024 |
| 1/8-finals | Krajicek A./Ram R. | Koolhof W./Mektic N. | 1:2 (4:6, 6:3, 7:10) | details | 28.09.2024 |
| World: Davis Cup - World Group - Doubles - Main |
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| | Bolelli S./Vavassori A. | Koolhof W./Van De Zandschulp B. | 0:2 (66:7, 5:7) | details | 15.09.2024 |
| | Koolhof W./Van De Zandschulp B. | Matos R./Melo M. | 2:0 (6:4, 7:65) | details | 12.09.2024 |
 USA: US Open - Doubles - Main |
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| Quarter-finals | Lammons N./Withrow J. | Koolhof W./Mektic N. | 2:1 (6:1, 65:7, 6:4) | details | 03.09.2024 |
| 1/8-finals | Koolhof W./Mektic N. | Heliovaara H./Patten H. | 2:0 (6:2, 6:2) | details | 02.09.2024 |
| 1/16-finals | Koolhof W./Mektic N. | Matos R./Melo M. | 2:1 (6:3, 65:7, 6:3) | details | 31.08.2024 |
| 1/32-finals | Koolhof W./Mektic N. | Griekspoor T./Kokkinakis T. | 2:0 (6:2, 7:64) | details | 30.08.2024 |
| USA: Winston-Salem - Doubles - Main |
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| 1/8-finals | Escobar G./Nedovyesov A. | Koolhof W./Mektic N. | 2:1 (7:61, 64:7, 11:9) | details | 20.08.2024 |
| USA: Cincinnati - Doubles - Main |
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| 1/8-finals | Heliovaara H./Patten H. | Koolhof W./Mektic N. | 2:1 (63:7, 7:62, 10:5) | details | 16.08.2024 |
| 1/16-finals | Lehecka J./Ruud C. | Koolhof W./Mektic N. | CAN. | details | 12.08.2024 |
| 1/16-finals | Doumbia S./Mannarino A. | Koolhof W./Mektic N. | 0:2 (4:6, 2:6) | details | 12.08.2024 |
| World: Olympic Games - Mixed Doubles - Main |
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| 3rd place | Auger-Aliassime F./Dabrowski G. | Koolhof W./Schuurs D. | 2:0 (6:3, 7:62) | details | 02.08.2024 |
| Semi-finals | Koolhof W./Schuurs D. | Zhang Z./Wang Xin. | 1:2 (6:2, 4:6, 4:10) | details | 01.08.2024 |
| Quarter-finals | Vavassori A./Errani S. | Koolhof W./Schuurs D. | 1:2 (7:64, 3:6, 9:11) | details | 31.07.2024 |
| World: Olympic Games - Doubles - Main |
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| 1/8-finals | Alcaraz C./Nadal R. | Griekspoor T./Koolhof W. | 2:1 (6:4, 62:7, 10:2) | details | 30.07.2024 |
| World: Olympic Games - Mixed Doubles - Main |
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| 1/8-finals | Koolhof W./Schuurs D. | Tsitsipas S./Sakkari M. | 2:0 (6:4, 7:63) | details | 29.07.2024 |
| World: Olympic Games - Doubles - Main |
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| 1/16-finals | Griekspoor T./Koolhof W. | Fucsovics M./Marozsan F. | 2:0 (6:2, 6:3) | details | 28.07.2024 |
 United Kingdom: Wimbledon - Doubles - Main |
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| 1/16-finals | Broom C./Fery A. | Koolhof W./Mektic N. | 2:0 (7:64, 7:65) | details | 07.07.2024 |
| 1/32-finals | Coria F./Navone M. | Koolhof W./Mektic N. | 0:2 (2:6, 1:6) | details | 04.07.2024 |
| United Kingdom: London - Doubles - Main |
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| Quarter-finals | Arevalo M./Pavic M. | Koolhof W./Mektic N. | 2:0 (6:4, 7:5) | details | 21.06.2024 |
| 1/8-finals | Baez S./Mannarino A. | Koolhof W./Mektic N. | 1:2 (6:4, 3:6, 3:10) | details | 19.06.2024 |
 Netherlands: Hertogenbosch - Doubles - Main |
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| Final | Koolhof W./Mektic N. | Lammons N./Withrow J. | 0:2 (65:7, 63:7) | details | 15.06.2024 |
| Semi-finals | Koolhof W./Mektic N. | Purcell M./Thompson J. | WO. | details | 14.06.2024 |
| Quarter-finals | Koolhof W./Mektic N. | Barrientos N./Cabral F. | 2:1 (5:7, 6:2, 10:5) | details | 13.06.2024 |
| 1/8-finals | Koolhof W./Mektic N. | Arneodo R./Weissborn S. | 2:0 (7:68, 6:2) | details | 12.06.2024 |
| France: French Open - Doubles - Main |
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| 1/16-finals | Koolhof W./Mektic N. | Purcell M./Thompson J. | 1:2 (6:4, 4:6, 4:6) | details | 02.06.2024 |