 World: Billie Jean King Cup - World Group - Doubles - Qualification |
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| | Garcia C./Mladenovic K. | Dart H./Watson H. | CAN. | details | 13.04.2024 |
 USA: Charleston - Doubles - Main |
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| Quarter-finals | Errani S./Mihalikova T. | Dart H./Watson H. | 2:1 (4:6, 6:2, 10:6) | details | 14.03.2024 |
| 1/8-finals | Dart H./Watson H. | Bassols M./Rus A. | 2:1 (4:6, 6:1, 11:9) | details | 12.03.2024 |
| World: Billie Jean King Cup - World Group - Doubles - Relegation - Play Offs |
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| | Dart H./Watson H. | Bergkvist Larsson B./Zaar L. | CAN. | details | 12.11.2023 |
 United Kingdom: Wimbledon - Doubles - Main |
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| 1/16-finals | Hruncakova V./Mihalikova T. | Dart H./Watson H. | 2:1 (1:6, 6:2, 6:4) | details | 08.07.2023 |
| 1/32-finals | Dart H./Watson H. | Kichenok L./Ostapenko J. | 2:1 (6:4, 3:6, 6:4) | details | 07.07.2023 |
| United Kingdom: Eastbourne - Doubles - Main |
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| 1/8-finals | Stefani L./Yang Z. | Dart H./Watson H. | 1:0 RET. (7:5) | details | 27.06.2023 |
| United Kingdom: Nottingham - Doubles - Main |
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| Final | Eikeri U./Neel I. | Dart H./Watson H. | 2:1 (7:66, 5:7, 10:8) | details | 18.06.2023 |
| Semi-finals | Dart H./Watson H. | Barnett A./Nicholls O. | 2:0 (6:4, 6:4) | details | 17.06.2023 |
| Quarter-finals | Bucsa C./Ninomiya M. | Dart H./Watson H. | 0:2 (4:6, 67:7) | details | 15.06.2023 |
| 1/8-finals | Dart H./Watson H. | Chan H-C./Chan L. | 2:0 (6:3, 6:4) | details | 14.06.2023 |
| United Kingdom: W100 Surbiton - Doubles - Main |
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| 1/8-finals | Dart H./Watson H. | Barnett A./Nicholls O. | 0:2 (1:6, 64:7) | details | 05.06.2023 |
 Thailand: Hua Hin - Doubles - Main |
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| 1/8-finals | Kumkhum L./Plipuech P. | Dart H./Watson H. | 2:1 (63:7, 6:4, 10:6) | details | 30.01.2023 |
 Tunisia: Monastir - Doubles - Main |
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| Quarter-finals | Dart H./Watson H. | Kato M./Kulikov A. | 0:2 (1:6, 4:6) | details | 06.10.2022 |
| 1/8-finals | Fomina A./Yashina E. | Dart H./Watson H. | 0:2 (3:6, 1:6) | details | 05.10.2022 |
| United Kingdom: Wimbledon - Doubles - Main |
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| 1/8-finals | Dart H./Watson H. | Kichenok L./Ostapenko J. | 1:2 (7:5, 4:6, 2:6) | details | 04.07.2022 |
| 1/16-finals | Dzalamidze N./Krunic A. | Dart H./Watson H. | 0:2 (4:6, 2:6) | details | 02.07.2022 |
| 1/32-finals | Bektas E./Kucova K. | Dart H./Watson H. | 0:2 (2:6, 4:6) | details | 01.07.2022 |
| United Kingdom: Eastbourne - Doubles - Main |
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| Quarter-finals | Kichenok L./Ostapenko J. | Dart H./Watson H. | 2:1 (4:6, 6:1, 10:3) | details | 23.06.2022 |
| 1/8-finals | Krawczyk D./Rogers S. | Dart H./Watson H. | 0:2 (5:7, 4:6) | details | 22.06.2022 |
| United Kingdom: Nottingham - Doubles - Main |
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| 1/8-finals | Heisen V./Murray S. | Dart H./Watson H. | CAN. | details | 07.06.2022 |
| United Kingdom: Wimbledon - Doubles - Main |
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| 1/8-finals | Dart H./Watson H. | Chan H-C./Chan L. | 1:2 (6:4, 2:6, 2:6) | details | 05.07.2021 |
| 1/16-finals | Martic P./Rogers S. | Dart H./Watson H. | 1:2 (6:3, 66:7, 1:6) | details | 03.07.2021 |
| 1/32-finals | Dart H./Watson H. | Kanepi K./Zhang S. | 2:0 (6:3, 6:2) | details | 01.07.2021 |
| United Kingdom: Eastbourne - Doubles - Main |
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| 1/8-finals | Dart H./Watson H. | Gauff C./Ostapenko J. | 1:2 (2:6, 6:2, 7:10) | details | 23.06.2021 |
| United Kingdom: Birmingham - Doubles - Main |
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| 1/8-finals | Dart H./Watson H. | Bains N./Martincova T. | 1:2 (6:4, 3:6, 5:10) | details | 15.06.2021 |
| World: Billie Jean King Cup - World Group - Doubles - Relegation - Play Offs |
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| | Dart H./Watson H. | Contreras Gomez F./Olmos G. | CAN. | details | 17.04.2021 |
 China: Tianjin - Doubles - Main |
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| 1/8-finals | Dart H./Watson H. | Han X.Y./Zhu L. | 1:2 (6:4, 4:6, 2:10) | details | 09.10.2019 |
| United Kingdom: Eastbourne - Doubles - Main |
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| 1/8-finals | Melichar-Martinez N./Peschke K. | Dart H./Watson H. | 2:1 (4:6, 7:61, 10:6) | details | 25.06.2019 |
| World: Billie Jean King Cup - World Group II - Doubles - Play Offs |
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| | Watson H./Dart H. | Danilina A./Voskoboeva G. | CAN. | details | 21.04.2019 |
