Spain: Barcelona - Singles - Main |
| 1/16-finals | Baez S. | Arnaldi M. | 1:2 (7:5, 68:7, 2:6) | details | 16.04.2024 |
| 1/32-finals | Arnaldi M. | Cazaux A. | 0:0 RET. (5:5) | details | 15.04.2024 |
Monaco: Monte Carlo - Singles - Main |
| 1/32-finals | Arnaldi M. | Nagal S. | 1:2 (7:5, 2:6, 4:6) | details | 08.04.2024 |
| 1/32-finals | Arnaldi M. | Ruusuvuori E. | CAN. | details | 08.04.2024 |
USA: Miami - Singles - Main |
| 1/8-finals | Machac T. | Arnaldi M. | 2:0 (6:3, 6:3) | details | 26.03.2024 |
| 1/16-finals | Arnaldi M. | Shapovalov D. | 2:0 (6:3, 7:67) | details | 24.03.2024 |
| 1/32-finals | Bublik A. | Arnaldi M. | 0:2 (4:6, 1:6) | details | 23.03.2024 |
| 1/64-finals | Fils A. | Arnaldi M. | 0:2 (3:6, 4:6) | details | 21.03.2024 |
USA: Indian Wells - Singles - Main |
| 1/32-finals | Arnaldi M. | Alcaraz C. | 1:2 (7:65, 0:6, 1:6) | details | 09.03.2024 |
| 1/64-finals | van Assche L. | Arnaldi M. | 0:2 (66:7, 63:7) | details | 06.03.2024 |
Mexico: Acapulco - Singles - Main |
| 1/8-finals | Shelton B. | Arnaldi M. | 2:1 (7:61, 3:6, 6:3) | details | 29.02.2024 |
| 1/16-finals | Arnaldi M. | Fritz T. | 2:1 (6:4, 4:6, 6:3) | details | 27.02.2024 |
Mexico: Los Cabos - Singles - Main |
| 1/16-finals | Purcell M. | Arnaldi M. | 2:1 (6:4, 4:6, 6:4) | details | 20.02.2024 |
USA: Delray Beach - Singles - Main |
| 1/8-finals | Hijikata R. | Arnaldi M. | 2:1 (6:2, 3:6, 6:4) | details | 14.02.2024 |
| 1/16-finals | Nishioka Y. | Arnaldi M. | 1:2 (6:4, 4:6, 3:6) | details | 12.02.2024 |
Australia: Australian Open - Singles - Main |
| 1/32-finals | De Minaur A. | Arnaldi M. | 3:0 (6:3, 6:0, 6:3) | details | 17.01.2024 |
| 1/64-finals | Arnaldi M. | Walton A. | 3:0 (7:65, 6:2, 6:4) | details | 14.01.2024 |
Australia: Adelaide - Singles - Main |
| 1/8-finals | Arnaldi M. | Jarry N. | 1:2 (7:65, 67:7, 4:6) | details | 10.01.2024 |
| 1/16-finals | Arnaldi M. | Zapata Miralles B. | 2:0 (6:4, 6:3) | details | 09.01.2024 |
| 1/16-finals | Arnaldi M. | Fucsovics M. | CAN. | details | 09.01.2024 |
Australia: Brisbane - Singles - Main |
| Quarter-finals | Safiullin R. | Arnaldi M. | 2:0 (7:64, 6:2) | details | 05.01.2024 |
| 1/8-finals | Arnaldi M. | Klein L. | 2:1 (6:4, 3:6, 7:5) | details | 03.01.2024 |
| 1/16-finals | Arnaldi M. | Fucsovics M. | 2:1 (65:7, 6:4, 7:67) | details | 02.01.2024 |
World: Davis Cup - World Group - Singles - Play Offs |
| | Popyrin A. | Arnaldi M. | 1:2 (5:7, 6:2, 4:6) | details | 26.11.2023 |
| | Arnaldi M. | Van De Zandschulp B. | 1:2 (7:66, 3:6, 67:7) | details | 23.11.2023 |
France: Paris - Singles - Main |
| 1/32-finals | Wawrinka S. | Arnaldi M. | CAN. | details | 30.10.2023 |
Austria: Vienna - Singles - Main |
| 1/8-finals | Arnaldi M. | Rublev A. | 0:2 (5:7, 3:6) | details | 26.10.2023 |
| 1/16-finals | Ramos A. | Arnaldi M. | 0:2 (64:7, 62:7) | details | 23.10.2023 |
China: Shanghai - Singles - Main |
| 1/16-finals | Arnaldi M. | Wolf J.J. | 1:2 (6:2, 3:6, 64:7) | details | 09.10.2023 |
| 1/32-finals | Struff J-L. | Arnaldi M. | 1:2 (3:6, 6:3, 4:6) | details | 07.10.2023 |
| 1/64-finals | Popyrin A. | Arnaldi M. | 1:2 (6:4, 3:6, 4:6) | details | 05.10.2023 |
China: Beijing - Singles - Main |
| 1/8-finals | Arnaldi M. | Jarry N. | 1:2 (7:64, 64:7, 3:6) | details | 30.09.2023 |
| 1/16-finals | Arnaldi M. | Wolf J.J. | 2:0 (6:2, 6:2) | details | 28.09.2023 |
China: Beijing - Singles - Qualification |
| Final | Arnaldi M. | Vukic A. | 2:0 (6:3, 6:2) | details | 27.09.2023 |
| Semi-finals | Arnaldi M. | Galan D. E. | 2:1 (4:6, 6:3, 7:612) | details | 26.09.2023 |
China: Zhuhai - Singles - Main |
| 1/16-finals | Arnaldi M. | Karatsev A. | 1:2 (7:65, 65:7, 2:6) | details | 21.09.2023 |
World: Davis Cup - World Group - Singles - Main |
| | Arnaldi M. | Borg L. | 2:0 (6:4, 6:3) | details | 17.09.2023 |
| | Arnaldi M. | Garin C. | 2:1 (2:6, 6:4, 6:3) | details | 15.09.2023 |
USA: US Open - Singles - Main |
| 1/8-finals | Alcaraz C. | Arnaldi M. | 3:0 (6:3, 6:3, 6:4) | details | 04.09.2023 |
| 1/16-finals | Arnaldi M. | Norrie C. | 3:0 (6:3, 6:4, 6:3) | details | 02.09.2023 |
| 1/32-finals | Fils A. | Arnaldi M. | 2:3 (6:3, 5:7, 65:7, 7:5, 4:6) | details | 31.08.2023 |
| 1/64-finals | Kubler J. | Arnaldi M. | 0:1 RET. (3:6, 0:1) | details | 29.08.2023 |
USA: Cincinnati - Singles - Qualification |
| Semi-finals | Moutet C. | Arnaldi M. | 2:1 (4:6, 6:0, 6:2) | details | 12.08.2023 |
Canada: Toronto - Singles - Main |
| 1/16-finals | Arnaldi M. | Medvedev D. | 0:2 (2:6, 5:7) | details | 09.08.2023 |