Spain: Murcia - Singles - Main |
| 1/16-finals | Vincent Ruggeri S. | Harris L. | 2:0 (7:64, 6:2) | details | 19.03.2024 |
Switzerland: Lugano - Singles - Main |
| 1/16-finals | Gea A. | Harris L. | 2:0 (6:4, 6:3) | details | 05.03.2024 |
France: Lille - Singles - Main |
| 1/16-finals | Harris L. | Pouille L. | 0:2 (64:7, 3:6) | details | 27.02.2024 |
France: Pau - Singles - Main |
| 1/16-finals | Harris L. | Prizmic D. | 1:2 (4:6, 6:4, 4:6) | details | 19.02.2024 |
Germany: Koblenz - Singles - Main |
| 1/16-finals | Otte O. | Harris L. | 2:1 (5:7, 6:1, 6:4) | details | 31.01.2024 |
Belgium: Ottignies-Louvain-la-Neuve - Singles - Main |
| 1/16-finals | Harris L. | Copil M. | 1:2 (64:7, 7:67, 0:6) | details | 24.01.2024 |
Australia: Australian Open - Singles - Main |
| 1/64-finals | Halys Q. | Harris L. | 3:1 (4:6, 7:65, 7:5, 7:62) | details | 14.01.2024 |
Australia: Australian Open - Singles - Qualification |
| Final | Gaston H. | Harris L. | 0:2 (0:6, 2:6) | details | 12.01.2024 |
| Semi-finals | Jacquet K. | Harris L. | 0:2 (5:7, 4:6) | details | 11.01.2024 |
| Quarter-finals | Rincon D. | Harris L. | 0:2 (2:6, 2:6) | details | 10.01.2024 |
Australia: Canberra - Singles - Main |
| 1/8-finals | Harris L. | Goffin D. | 0:2 (4:6, 4:6) | details | 03.01.2024 |
| 1/16-finals | Harris L. | Misolic F. | 2:0 (7:5, 7:64) | details | 01.01.2024 |
Austria: Vienna - Singles - Qualification |
| Semi-finals | Harris L. | Muller A. | 0:2 (1:6, 4:6) | details | 21.10.2023 |
Italy: Olbia - Singles - Main |
| 1/8-finals | De Loore J. | Harris L. | 2:0 (6:3, 7:66) | details | 19.10.2023 |
| 1/16-finals | Harris L. | Giannessi A. | 2:0 (7:63, 6:0) | details | 17.10.2023 |
China: Shanghai - Singles - Qualification |
| Semi-finals | Harris L. | Palan D. | 1:2 (6:3, 3:6, 64:7) | details | 02.10.2023 |
China: Beijing - Singles - Main |
| 1/16-finals | Harris L. | Etcheverry T. M. | 1:2 (7:65, 64:7, 3:6) | details | 28.09.2023 |
China: Beijing - Singles - Qualification |
| Final | Garin C. | Harris L. | 0:2 (3:6, 0:6) | details | 27.09.2023 |
| Semi-finals | Harris L. | Altmaier D. | 2:0 (6:3, 6:1) | details | 26.09.2023 |
China: Zhuhai - Singles - Main |
| 1/8-finals | Nishioka Y. | Harris L. | 2:0 (7:64, 7:65) | details | 22.09.2023 |
| 1/16-finals | Harris L. | Vesely J. | 2:0 (6:4, 6:2) | details | 20.09.2023 |
USA: US Open - Singles - Main |
| 1/32-finals | Alcaraz C. | Harris L. | 3:0 (6:3, 6:1, 7:64) | details | 01.09.2023 |
| 1/64-finals | Harris L. | Pella G. | 3:0 (7:65, 6:4, 6:4) | details | 30.08.2023 |
USA: Cincinnati - Singles - Main |
| 1/32-finals | Harris L. | Purcell M. | 0:2 (4:6, 4:6) | details | 15.08.2023 |
USA: Cary - Singles - Main |
| Quarter-finals | Harris L. | Broady L. | 0:2 (3:6, 4:6) | details | 11.08.2023 |
| 1/8-finals | Cazaux A. | Harris L. | 0:2 (4:6, 64:7) | details | 10.08.2023 |
| 1/16-finals | Mochizuki S. | Harris L. | 1:2 (7:64, 3:6, 2:6) | details | 08.08.2023 |
USA: Washington - Singles - Main |
| 1/32-finals | Harris L. | Shimabukuro S. | 0:2 (4:6, 3:6) | details | 01.08.2023 |
| 1/32-finals | Harris L. | Nishikori K. | CAN. | details | 01.08.2023 |
USA: Atlanta - Singles - Main |
| 1/8-finals | Humbert U. | Harris L. | 2:0 (7:66, 6:4) | details | 26.07.2023 |
| 1/16-finals | Harris L. | Duckworth J. | 2:1 (3:6, 6:3, 6:2) | details | 24.07.2023 |
USA: Atlanta - Singles - Qualification |
| Final | Mmoh M. | Harris L. | 1:2 (2:6, 7:65, 62:7) | details | 23.07.2023 |
| Semi-finals | Young D. | Harris L. | 0:2 (1:6, 2:6) | details | 22.07.2023 |