Romania: Cluj-Napoca - Doubles - Main |
| 1/8-finals | Minnen G./Wickmayer Y. | Barnett A./Nicholls O. | 2:1 (64:7, 6:2, 10:8) | details | 17.10.2023 |
France: Rouen - Doubles - Main |
| Semi-finals | Bondar A./Zimmermann K. | Barnett A./Nicholls O. | 2:1 (6:4, 66:7, 10:1) | details | 14.10.2023 |
| Quarter-finals | Barnett A./Nicholls O. | Naef C./Teichmann J. | 2:1 (3:6, 6:4, 10:4) | details | 12.10.2023 |
| 1/8-finals | Barnett A./Nicholls O. | Jeanjean L./Lemaitre T. | 2:0 (6:2, 6:3) | details | 10.10.2023 |
Mexico: Guadalajara - Doubles - Main |
| 1/16-finals | Barnett A./Nicholls O. | Jabeur O./Stearns P. | 0:2 (3:6, 2:6) | details | 17.09.2023 |
Japan: Osaka - Doubles - Main |
| 1/8-finals | Barnett A./Nicholls O. | Friedsam A-L./Kichenok N. | 1:2 (2:6, 6:3, 9:11) | details | 12.09.2023 |
Japan: W100 Tokyo - Doubles - Main |
| Final | Ponchet J./Schoofs B. | Barnett A./Nicholls O. | 2:1 (4:6, 6:1, 10:7) | details | 09.09.2023 |
| Semi-finals | Eala A./Kawaguchi N. | Barnett A./Nicholls O. | 1:2 (0:6, 7:5, 6:10) | details | 08.09.2023 |
| Quarter-finals | Hartono A./You X. | Barnett A./Nicholls O. | 0:2 (3:6, 3:6) | details | 07.09.2023 |
| 1/8-finals | Hayashi E./Morisaki K. | Barnett A./Nicholls O. | 1:2 (64:7, 7:5, 9:11) | details | 06.09.2023 |
Poland: Grodzisk Mazowiecki - Doubles - Main |
| Quarter-finals | Barnett A./Nicholls O. | Raina A./Yastremska D. | 0:2 (1:6, 4:6) | details | 09.08.2023 |
| 1/8-finals | Barnett A./Nicholls O. | Chwalinska M./Hruncakova V. | 2:0 (7:5, 6:2) | details | 07.08.2023 |
Czech Republic: Livesport Prague Open - Doubles - Main |
| Quarter-finals | Gleason Q./Lechemia E. | Barnett A./Nicholls O. | 2:0 (7:5, 7:5) | details | 03.08.2023 |
| 1/8-finals | Heisen V./Tjandramulia O. | Barnett A./Nicholls O. | 0:2 (3:6, 4:6) | details | 31.07.2023 |
Poland: Warsaw - Doubles - Main |
| 1/8-finals | Watson H./Wickmayer Y. | Barnett A./Nicholls O. | 2:1 (6:2, 5:7, 10:7) | details | 27.07.2023 |
| 1/8-finals | Barnett A./Nicholls O. | Chwalinska M./Ponchet J. | CAN. | details | 25.07.2023 |
Spain: W100 Vitoria-Gasteiz - Doubles - Main |
| Final | Barnett A./Nicholls O. | Cascino E./Marcinkevica D. | 2:0 (6:3, 6:4) | details | 22.07.2023 |
| Semi-finals | Barnett A./Nicholls O. | Karatancheva L./Karatantcheva S. | 2:0 (6:1, 6:2) | details | 21.07.2023 |
| Quarter-finals | Barnett A./Nicholls O. | Garcia-Perez G./Krunic A. | WO. | details | 20.07.2023 |
| 1/8-finals | Barnett A./Nicholls O. | Shinde V./Zeballos N. | 2:0 (6:0, 6:3) | details | 18.07.2023 |
United Kingdom: Wimbledon - Doubles - Main |
| 1/32-finals | Marozava L./Gamarra Martins I. | Barnett A./Nicholls O. | 2:0 (6:0, 6:3) | details | 07.07.2023 |
| 1/32-finals | Kudermetova V./Samsonova L. | Barnett A./Nicholls O. | CAN. | details | 07.07.2023 |
United Kingdom: Birmingham - Doubles - Main |
| 1/8-finals | Barnett A./Nicholls O. | Eikeri U./Panova A. | 1:2 (6:2, 2:6, 5:10) | details | 20.06.2023 |
United Kingdom: Nottingham - Doubles - Main |
| Semi-finals | Dart H./Watson H. | Barnett A./Nicholls O. | 2:0 (6:4, 6:4) | details | 17.06.2023 |
| Quarter-finals | Barnett A./Nicholls O. | Muhammad A./Olmos G. | 2:0 (6:3, 6:2) | details | 16.06.2023 |
| 1/8-finals | Appleton E./Burrage J. | Barnett A./Nicholls O. | 0:2 (4:6, 4:6) | details | 14.06.2023 |
United Kingdom: W100 Surbiton - Doubles - Main |
| Final | Chang S./Wickmayer Y. | Barnett A./Nicholls O. | 2:0 (6:4, 6:1) | details | 09.06.2023 |
| Semi-finals | Barnett A./Nicholls O. | Appleton E./Lohoff J. | 2:0 (6:4, 6:4) | details | 08.06.2023 |
| Quarter-finals | Gleason Q./Lechemia E. | Barnett A./Nicholls O. | 0:2 (63:7, 5:7) | details | 07.06.2023 |
| 1/8-finals | Dart H./Watson H. | Barnett A./Nicholls O. | 0:2 (1:6, 64:7) | details | 05.06.2023 |
France: French Open - Doubles - Main |
| 1/32-finals | Paolini J./Trevisan M. | Barnett A./Nicholls O. | 2:1 (7:65, 1:6, 6:4) | details | 31.05.2023 |
Morocco: Rabat - Doubles - Main |
| 1/8-finals | Barnett A./Nicholls O. | Chong E./Di Lorenzo F. | 1:2 (6:1, 4:6, 1:10) | details | 23.05.2023 |
| 1/8-finals | Barnett A./Nicholls O. | Parrizas-Diaz N./Yashina E. | CAN. | details | 23.05.2023 |
Germany: W100 Wiesbaden - Doubles - Main |
| Semi-finals | Barnett A./Nicholls O. | Fourlis J./Gadecki O. | 0:2 (4:6, 5:7) | details | 05.05.2023 |
| Quarter-finals | Barnett A./Nicholls O. | Jakupovic D./Radisic N. | 2:0 (6:4, 6:1) | details | 04.05.2023 |
| 1/8-finals | Barnett A./Nicholls O. | Laskutova K./Makarova E. | 2:0 (6:2, 6:0) | details | 03.05.2023 |
Portugal: W60 Oeiras - Doubles - Main |
| Semi-finals | Maleckova J./Voracova R. | Barnett A./Nicholls O. | 2:0 (6:4, 6:4) | details | 28.04.2023 |
| Quarter-finals | Berberovic N./Gavrila O. | Barnett A./Nicholls O. | 1:2 (1:6, 6:3, 5:10) | details | 27.04.2023 |
| 1/8-finals | Haverlag I./Mikulskyte J. | Barnett A./Nicholls O. | 0:2 (66:7, 5:7) | details | 25.04.2023 |
Portugal: W100 Oeiras - Doubles - Main |
| Semi-finals | Eikeri U./Hozumi E. | Barnett A./Nicholls O. | 2:0 (6:2, 6:1) | details | 22.04.2023 |
| Quarter-finals | Barnett A./Nicholls O. | Abduraimova N./Uchijima M. | 2:0 (7:5, 6:1) | details | 20.04.2023 |
| 1/8-finals | Barnett A./Nicholls O. | Cortez Llorca L./Murta I. | 2:1 (4:6, 6:1, 10:6) | details | 18.04.2023 |
World: Billie Jean King Cup - World Group - Doubles - Qualification |
| | Barnett A./Nicholls O. | Garcia C./Mladenovic K. | CAN. | details | 15.04.2023 |
| | Barnett A./Nicholls O. | Burel C./Mladenovic K. | 2:1 (7:5, 3:6, 11:9) | details | 15.04.2023 |
USA: Charleston - Doubles - Main |
| 1/8-finals | Barnett A./Nicholls O. | Melichar-Martinez N./Parks A. | 1:2 (7:5, 68:7, 8:10) | details | 05.04.2023 |
Mexico: San Luis Potosi - Doubles - Main |
| 1/8-finals | Barnett A./Nicholls O. | Gamarra Martins I./Wu F. | 1:2 (7:5, 4:6, 0:10) | details | 29.03.2023 |
Slovakia: W60 Trnava 2 - Doubles - Main |
| Final | Barnett A./Nicholls O. | Anshba A./Detiuc A. | 2:0 (6:3, 6:3) | details | 11.03.2023 |
| Semi-finals | Barnett A./Nicholls O. | Eala A./Mikulskyte J. | 2:0 (6:4, 6:1) | details | 10.03.2023 |
| Quarter-finals | Barnett A./Nicholls O. | Erjavec V./Webley-Smith E. | 2:0 (6:2, 7:5) | details | 09.03.2023 |
| 1/8-finals | Barnett A./Nicholls O. | Malygina E./Wagner A. | 2:0 (6:4, 6:0) | details | 08.03.2023 |