Spain: Madrid - Singles - Main |
| 1/32-finals | Boulter K. | Montgomery R. | 1:2 (6:1, 3:6, 4:6) | details | 26.04.2024 |
World: Billie Jean King Cup - World Group - Singles - Qualification |
| | Burel C. | Boulter K. | 0:2 (5:7, 0:6) | details | 13.04.2024 |
| | Garcia C. | Boulter K. | CAN. | details | 13.04.2024 |
| | Parry D. | Boulter K. | 2:0 (6:2, 6:0) | details | 12.04.2024 |
USA: Miami - Singles - Main |
| 1/8-finals | Azarenka V. | Boulter K. | 2:0 (7:5, 6:1) | details | 25.03.2024 |
| 1/16-finals | Boulter K. | Haddad Maia B. | 2:0 (6:2, 6:3) | details | 24.03.2024 |
| 1/32-finals | Boulter K. | Fruhvirtova B. | 1:0 RET. (7:65, 1:0) | details | 21.03.2024 |
USA: Indian Wells - Singles - Main |
| 1/64-finals | Giorgi C. | Boulter K. | 2:0 (6:3, 6:2) | details | 06.03.2024 |
USA: San Diego - Singles - Main |
| Final | Kostyuk M. | Boulter K. | 1:2 (7:5, 2:6, 2:6) | details | 04.03.2024 |
| Semi-finals | Navarro E. | Boulter K. | 0:2 (3:6, 1:6) | details | 03.03.2024 |
| Quarter-finals | Vekic D. | Boulter K. | 0:2 (4:6, 3:6) | details | 01.03.2024 |
| 1/8-finals | Boulter K. | Haddad Maia B. | 2:1 (3:6, 6:3, 6:4) | details | 29.02.2024 |
| 1/16-finals | Tsurenko L. | Boulter K. | 0:2 (3:6, 1:6) | details | 26.02.2024 |
Austria: Linz - Singles - Main |
| 1/8-finals | Pavlyuchenkova A. | Boulter K. | 2:0 (7:62, 6:4) | details | 31.01.2024 |
| 1/16-finals | Boulter K. | Paolini J. | 2:0 (6:2, 6:2) | details | 29.01.2024 |
Australia: Australian Open - Singles - Main |
| 1/32-finals | Zheng Q. | Boulter K. | 2:0 (6:3, 6:3) | details | 18.01.2024 |
| 1/64-finals | Boulter K. | Yuan Y. | 2:0 (7:5, 7:61) | details | 16.01.2024 |
Australia: Adelaide - Singles - Main |
| 1/16-finals | Boulter K. | Bogdan A. | 0:2 (3:6, 4:6) | details | 08.01.2024 |
| 1/16-finals | Boulter K. | Tsurenko L. | CAN. | details | 08.01.2024 |
Australia: Adelaide - Singles - Qualification |
| Final | Boulter K. | Krueger A. | 2:0 (7:61, 6:1) | details | 07.01.2024 |
| Semi-finals | Boulter K. | Parks A. | 2:1 (6:4, 5:7, 6:0) | details | 06.01.2024 |
Australia: United Cup - Singles - Main |
| | Pegula J. | Boulter K. | 1:2 (7:5, 4:6, 4:6) | details | 31.12.2023 |
| | Boulter K. | Tomljanovic A. | 2:0 (6:2, 6:4) | details | 29.12.2023 |
World: Billie Jean King Cup - World Group - Singles - Relegation - Play Offs |
| | Boulter K. | Rinaldo Persson K. | 2:0 (6:1, 7:65) | details | 12.11.2023 |
| | Boulter K. | Hennemann C. W. | 2:0 (6:2, 6:1) | details | 11.11.2023 |
South Korea: Seoul - Singles - Main |
| 1/16-finals | Boulter K. | Juvan K. | 0:2 (4:6, 4:6) | details | 09.10.2023 |
China: Beijing - Singles - Main |
| 1/16-finals | Sabalenka A. | Boulter K. | 2:0 (7:5, 7:62) | details | 03.10.2023 |
| 1/32-finals | Frech M. | Boulter K. | 1:2 (4:6, 6:3, 2:6) | details | 01.10.2023 |
China: Beijing - Singles - Qualification |
| Final | Boulter K. | Rakhimova K. | 2:0 (6:1, 6:1) | details | 30.09.2023 |
| Semi-finals | Boulter K. | Bai Z. | 2:0 (6:2, 6:2) | details | 29.09.2023 |
China: Ningbo - Singles - Main |
| 1/16-finals | Zvonareva V. | Boulter K. | 2:1 (6:4, 4:6, 7:63) | details | 25.09.2023 |
USA: US Open - Singles - Main |
| 1/16-finals | Boulter K. | Stearns P. | 0:2 (4:6, 3:6) | details | 03.09.2023 |
| 1/32-finals | Wang Y. | Boulter K. | 1:2 (7:5, 1:6, 4:6) | details | 31.08.2023 |
| 1/64-finals | Boulter K. | Parry D. | 2:0 (6:4, 6:0) | details | 29.08.2023 |
USA: Cincinnati - Singles - Qualification |
| Semi-finals | Boulter K. | Osorio C. | 1:1 RET. (6:4, 65:7, 0:1) | details | 12.08.2023 |
Canada: Montreal - Singles - Main |
| 1/16-finals | Boulter K. | Gauff C. | 0:2 (2:6, 2:6) | details | 09.08.2023 |
| 1/32-finals | Boulter K. | Marino R. | 2:0 (6:3, 6:1) | details | 08.08.2023 |
Canada: Montreal - Singles - Qualification |
| Final | Boulter K. | Bassols M. | 2:0 (6:2, 6:2) | details | 06.08.2023 |
| Semi-finals | Boulter K. | Bulgaru M. | 2:0 (6:3, 6:3) | details | 05.08.2023 |
USA: Washington - Singles - Qualification |
| Final | Fernandez L. | Boulter K. | 2:0 (6:4, 6:1) | details | 30.07.2023 |
| Semi-finals | Mandlik E. | Boulter K. | 0:2 (5:7, 3:6) | details | 29.07.2023 |
United Kingdom: Wimbledon - Singles - Main |
| 1/16-finals | Boulter K. | Rybakina E. | 0:2 (1:6, 1:6) | details | 08.07.2023 |