Spain: Madrid - Singles - Main |
| 1/64-finals | Hanfmann Y. | Mensik J. | 0:2 (4:6, 63:7) | details | 25.04.2024 |
USA: Miami - Singles - Qualification |
| Final | Mensik J. | Klein L. | 0:2 (66:7, 5:7) | details | 19.03.2024 |
| Semi-finals | Mensik J. | Nardi L. | 2:0 (6:4, 6:2) | details | 18.03.2024 |
USA: Indian Wells - Singles - Main |
| 1/32-finals | Shelton B. | Mensik J. | 2:1 (4:6, 6:3, 6:4) | details | 09.03.2024 |
| 1/64-finals | Mensik J. | Hong S. C. | 2:0 (6:3, 6:4) | details | 07.03.2024 |
United Arab Emirates: Dubai - Singles - Main |
| 1/8-finals | Mensik J. | Davidovich Fokina A. | 0:1 RET. (67:7, 0:1) | details | 28.02.2024 |
| 1/16-finals | Mensik J. | Coric B. | 2:1 (4:6, 6:3, 7:67) | details | 27.02.2024 |
Qatar: Doha - Singles - Main |
| Final | Mensik J. | Khachanov K. | 0:2 (612:7, 4:6) | details | 24.02.2024 |
| Semi-finals | Mensik J. | Monfils G. | 2:1 (6:4, 1:6, 6:3) | details | 23.02.2024 |
| Quarter-finals | Rublev A. | Mensik J. | 0:2 (4:6, 66:7) | details | 22.02.2024 |
| 1/8-finals | Murray A. | Mensik J. | 1:2 (66:7, 7:63, 64:7) | details | 21.02.2024 |
| 1/16-finals | Mensik J. | Davidovich Fokina A. | 2:0 (7:63, 6:4) | details | 20.02.2024 |
Bahrain: Manama - Singles - Main |
| Semi-finals | Mensik J. | Kukushkin M. | 0:2 (3:6, 2:6) | details | 16.02.2024 |
| Quarter-finals | Trungelliti M. | Mensik J. | 0:1 RET. (3:6, 1:2) | details | 15.02.2024 |
| 1/8-finals | Fatic N. | Mensik J. | 0:2 (1:6, 4:6) | details | 14.02.2024 |
| 1/16-finals | Basilashvili N. | Mensik J. | 0:2 (3:6, 4:6) | details | 13.02.2024 |
World: Davis Cup - World Group - Singles - Qualification |
| | Mensik J. | Cukierman D. | CAN. | details | 04.02.2024 |
| | Mensik J. | Oliel Y. | 2:0 (6:1, 7:64) | details | 03.02.2024 |
Australia: Australian Open - Singles - Main |
| 1/32-finals | Mensik J. | Hurkacz H. | 2:3 (7:69, 1:6, 7:5, 1:6, 3:6) | details | 18.01.2024 |
| 1/64-finals | Shapovalov D. | Mensik J. | 0:3 (3:6, 5:7, 5:7) | details | 15.01.2024 |
Australia: Australian Open - Singles - Qualification |
| Final | Mayot H. | Mensik J. | 0:2 (3:6, 62:7) | details | 12.01.2024 |
| Semi-finals | Gaio F. | Mensik J. | 1:2 (4:6, 6:3, 3:6) | details | 11.01.2024 |
| Quarter-finals | Mensik J. | Nakashima B. | 2:0 (6:4, 7:64) | details | 10.01.2024 |
Australia: Canberra - Singles - Main |
| Final | Koepfer D. | Mensik J. | 2:0 (6:3, 6:2) | details | 06.01.2024 |
| Semi-finals | Mensik J. | Nakashima B. | 2:0 (7:5, 7:5) | details | 05.01.2024 |
| Quarter-finals | Mensik J. | Ritschard A. | WO. | details | 04.01.2024 |
| 1/8-finals | Yevseyev D. | Mensik J. | 0:2 (4:6, 4:6) | details | 03.01.2024 |
| 1/16-finals | Mensik J. | Hassan B. | 2:0 (6:3, 7:5) | details | 01.01.2024 |
Sweden: Danderyd - Singles - Main |
| Quarter-finals | Blockx A. | Mensik J. | 2:0 (6:3, 6:0) | details | 17.11.2023 |
| 1/8-finals | Mensik J. | Medjedovic H. | 2:1 (4:6, 7:62, 7:68) | details | 16.11.2023 |
| 1/16-finals | Mensik J. | Dahlin M. | 2:0 (6:2, 7:63) | details | 14.11.2023 |
Finland: Helsinki - Singles - Main |
| 1/8-finals | Mensik J. | Nagal S. | 0:2 (5:7, 2:6) | details | 08.11.2023 |
| 1/16-finals | Cobolli F. | Mensik J. | 0:2 (5:7, 66:7) | details | 07.11.2023 |
Slovakia: Bratislava 2 - Singles - Main |
| 1/16-finals | Martineau M. | Mensik J. | 2:1 (4:6, 6:4, 6:1) | details | 10.10.2023 |
| 1/16-finals | Ilkel C. | Mensik J. | CAN. | details | 10.10.2023 |
| 1/16-finals | Vesely J. | Mensik J. | CAN. | details | 10.10.2023 |
France: Mouilleron-Le-Captif - Singles - Main |
| 1/16-finals | Draper J. | Mensik J. | 2:0 (6:4, 6:2) | details | 04.10.2023 |
France: Orleans - Singles - Main |
| 1/16-finals | Ymer E. | Mensik J. | 2:0 (6:3, 6:2) | details | 27.09.2023 |
| 1/16-finals | Novak D. | Mensik J. | CAN. | details | 27.09.2023 |
World: Davis Cup - World Group - Singles - Main |
| | Lajovic D. | Mensik J. | 0:2 (3:6, 2:6) | details | 16.09.2023 |
USA: US Open - Singles - Main |
| 1/16-finals | Mensik J. | Fritz T. | 0:3 (1:6, 2:6, 0:6) | details | 02.09.2023 |
| 1/32-finals | Droguet T. | Mensik J. | 1:3 (6:3, 2:6, 61:7, 3:6) | details | 31.08.2023 |
| 1/64-finals | Mensik J. | Barrere G. | 3:1 (6:4, 4:6, 7:61, 6:2) | details | 28.08.2023 |
USA: US Open - Singles - Qualification |
| Final | Kolar Z. | Mensik J. | 0:2 (5:7, 4:6) | details | 26.08.2023 |
| Semi-finals | Mensik J. | Riedi L. | 2:1 (65:7, 6:3, 6:4) | details | 25.08.2023 |
Czech Republic: Liberec - Singles - Main |
| 1/16-finals | Mensik J. | Kopriva V. | 0:1 RET. (3:6, 0:1) | details | 02.08.2023 |