United Kingdom: Eastbourne - Singles - Qualification |
| Semi-finals | O'Connell C. | Monday J. | 1:2 (3:6, 6:2, 4:6) | dettagli | 21.06.2025 |
United Kingdom: London - Singles - Main |
| 1/16-finals | Rune H. | O'Connell C. | 2:0 (6:3, 6:4) | dettagli | 16.06.2025 |
United Kingdom: London - Singles - Qualification |
| Final | Bolt A. | O'Connell C. | 2:1 (3:6, 7:64, 6:3) | dettagli | 15.06.2025 |
| Semi-finals | Duckworth J. | O'Connell C. | 0:2 (64:7, 0:6) | dettagli | 14.06.2025 |
Netherlands: Hertogenbosch - Singles - Main |
| 1/16-finals | Mannarino A. | O'Connell C. | 2:0 (6:1, 6:3) | dettagli | 11.06.2025 |
United Kingdom: Birmingham - Singles - Main |
| 1/16-finals | Moreno De Alboran N. | O'Connell C. | 2:0 (6:4, 6:3) | dettagli | 03.06.2025 |
France: French Open - Singles - Main |
| 1/64-finals | O'Connell C. | Humbert U. | 0:3 (5:7, 3:6, 63:7) | dettagli | 26.05.2025 |
Germany: Hamburg - Singles - Qualification |
| Semi-finals | O'Connell C. | Ymer E. | 1:2 (2:6, 6:3, 4:6) | dettagli | 17.05.2025 |
Italy: Rome - Singles - Main |
| 1/64-finals | O'Connell C. | Norrie C. | 0:2 (3:6, 2:6) | dettagli | 07.05.2025 |
Spain: Madrid - Singles - Main |
| 1/32-finals | Fritz T. | O'Connell C. | 2:0 (6:1, 6:4) | dettagli | 25.04.2025 |
| 1/64-finals | O'Connell C. | Ugo Carabelli C. | 2:0 (6:3, 6:4) | dettagli | 23.04.2025 |
Germany: Munich - Singles - Main |
| 1/16-finals | O'Connell C. | Darderi L. | 0:2 (63:7, 63:7) | dettagli | 15.04.2025 |
Germany: Munich - Singles - Qualification |
| Semi-finals | O'Connell C. | Tseng C. H. | 0:2 (3:6, 2:6) | dettagli | 12.04.2025 |
Romania: Bucharest - Singles - Main |
| Quarter-finals | O'Connell C. | Fucsovics M. | 0:2 (0:6, 4:6) | dettagli | 04.04.2025 |
| 1/8-finals | Jarry N. | O'Connell C. | 1:2 (2:6, 7:5, 65:7) | dettagli | 03.04.2025 |
| 1/16-finals | Lajovic D. | O'Connell C. | 0:2 (4:6, 3:6) | dettagli | 01.04.2025 |
USA: Miami - Singles - Main |
| 1/64-finals | O'Connell C. | Carballes Baena R. | 1:2 (3:6, 6:3, 65:7) | dettagli | 19.03.2025 |
USA: Miami - Singles - Qualification |
| Final | O'Connell C. | Trungelliti M. | 2:0 (6:2, 6:3) | dettagli | 18.03.2025 |
| Semi-finals | O'Connell C. | Draxl L. | 2:0 (7:5, 6:0) | dettagli | 17.03.2025 |
| Semi-finals | O'Connell C. | Harris L. | CAN. | dettagli | 17.03.2025 |
USA: Indian Wells - Singles - Main |
| 1/32-finals | Berrettini M. | O'Connell C. | 2:0 (6:2, 7:62) | dettagli | 07.03.2025 |
| 1/64-finals | Carballes Baena R. | O'Connell C. | 1:2 (3:6, 6:0, 1:6) | dettagli | 05.03.2025 |
United Arab Emirates: Dubai - Singles - Main |
| 1/8-finals | Berrettini M. | O'Connell C. | 2:0 (7:62, 6:2) | dettagli | 26.02.2025 |
| 1/16-finals | O'Connell C. | Dimitrov G. | 1:0 RET. (6:0) | dettagli | 25.02.2025 |
United Arab Emirates: Dubai - Singles - Qualification |
| Final | O'Connell C. | Van De Zandschulp B. | 2:0 (7:65, 6:4) | dettagli | 23.02.2025 |
| Semi-finals | O'Connell C. | Al Janahi A. | 2:0 (6:2, 6:0) | dettagli | 22.02.2025 |
Qatar: Doha - Singles - Main |
| 1/8-finals | O'Connell C. | Draper J. | 0:2 (2:6, 1:6) | dettagli | 19.02.2025 |
| 1/16-finals | O'Connell C. | Habib H. | 2:0 (7:67, 7:63) | dettagli | 17.02.2025 |
Qatar: Doha - Singles - Qualification |
| Final | O'Connell C. | Kotov P. | 2:0 (6:4, 6:2) | dettagli | 16.02.2025 |
| Semi-finals | O'Connell C. | Watanuki Y. | 2:1 (63:7, 7:64, 6:3) | dettagli | 15.02.2025 |
Australia: Australian Open - Singles - Main |
| 1/64-finals | O'Connell C. | Paul T. | 2:3 (2:6, 6:3, 1:6, 7:65, 5:7) | dettagli | 13.01.2025 |
Australia: Adelaide - Singles - Main |
| 1/8-finals | Kecmanovic M. | O'Connell C. | 2:0 (7:61, 6:2) | dettagli | 08.01.2025 |
| 1/16-finals | Rinderknech A. | O'Connell C. | 0:2 (5:7, 65:7) | dettagli | 06.01.2025 |
Australia: Brisbane - Singles - Main |
| 1/16-finals | Michelsen A. | O'Connell C. | 2:1 (6:4, 4:6, 7:610) | dettagli | 30.12.2024 |
Serbia: Belgrade 2 - Singles - Main |
| Quarter-finals | O'Connell C. | Shapovalov D. | 0:2 (2:6, 2:6) | dettagli | 07.11.2024 |
| 1/8-finals | Altmaier D. | O'Connell C. | 0:2 (3:6, 1:6) | dettagli | 06.11.2024 |
| 1/16-finals | Kecmanovic M. | O'Connell C. | 0:2 (1:6, 1:6) | dettagli | 04.11.2024 |
France: Paris - Singles - Main |
| 1/32-finals | Khachanov K. | O'Connell C. | 2:1 (6:4, 3:6, 7:66) | dettagli | 29.10.2024 |
France: Paris - Singles - Qualification |
| Final | O'Connell C. | Davidovich Fokina A. | 1:2 (3:6, 6:4, 3:6) | dettagli | 27.10.2024 |
| Semi-finals | Nagal S. | O'Connell C. | 0:2 (4:6, 63:7) | dettagli | 26.10.2024 |
| Semi-finals | Martinez P. | O'Connell C. | CAN. | dettagli | 26.10.2024 |
Switzerland: Basel - Singles - Qualification |
| Semi-finals | Fearnley J. | O'Connell C. | 2:1 (6:4, 1:6, 6:4) | dettagli | 19.10.2024 |
Kazakhstan: Almaty - Singles - Main |
| 1/16-finals | O'Connell C. | Diallo G. | 0:2 (65:7, 2:6) | dettagli | 15.10.2024 |
China: Shanghai - Singles - Main |
| 1/64-finals | O'Connell C. | Berrettini M. | 0:2 (69:7, 66:7) | dettagli | 03.10.2024 |
Japan: Tokyo - Singles - Main |
| 1/8-finals | O'Connell C. | Michelsen A. | 0:2 (1:6, 4:6) | dettagli | 28.09.2024 |
| 1/16-finals | Etcheverry T. M. | O'Connell C. | 0:2 (4:6, 65:7) | dettagli | 26.09.2024 |
Japan: Tokyo - Singles - Qualification |
| Final | Daniel T. | O'Connell C. | 0:2 (3:6, 5:7) | dettagli | 24.09.2024 |