Spain: Madrid - Singles - Main |
| 1/64-finals | Galan D. E. | Bautista-Agut R. | 1:2 (64:7, 6:4, 1:6) | details | 25.04.2024 |
Germany: Munich - Singles - Main |
| 1/8-finals | Galan D. E. | Rune H. | 0:2 (4:6, 2:6) | details | 18.04.2024 |
| 1/16-finals | Ugo Carabelli C. | Galan D. E. | 0:2 (62:7, 4:6) | details | 16.04.2024 |
USA: Houston - Singles - Main |
| 1/8-finals | Etcheverry T. M. | Galan D. E. | 2:0 (6:4, 6:4) | details | 04.04.2024 |
| 1/16-finals | Galan D. E. | Paire B. | 2:0 (7:613, 6:4) | details | 02.04.2024 |
USA: Miami - Singles - Main |
| 1/64-finals | Galan D. E. | Shevchenko A. | 1:2 (7:64, 64:7, 5:7) | details | 22.03.2024 |
USA: Phoenix - Singles - Main |
| 1/8-finals | Kudla D. | Galan D. E. | 2:0 (6:2, 6:3) | details | 14.03.2024 |
| 1/16-finals | Rodionov J. | Galan D. E. | 0:2 (4:6, 4:6) | details | 12.03.2024 |
USA: Indian Wells - Singles - Main |
| 1/64-finals | Daniel T. | Galan D. E. | 2:0 (6:4, 6:1) | details | 06.03.2024 |
Chile: Santiago - Singles - Main |
| 1/16-finals | Galan D. E. | Darderi L. | CAN. | details | 27.02.2024 |
Brazil: Rio de Janeiro - Singles - Main |
| 1/16-finals | Lajovic D. | Galan D. E. | 2:1 (4:6, 7:68, 6:1) | details | 20.02.2024 |
Argentina: Buenos Aires - Singles - Main |
| 1/8-finals | Galan D. E. | Etcheverry T. M. | 0:2 (3:6, 0:6) | details | 14.02.2024 |
| 1/16-finals | Schwartzman D. | Galan D. E. | 1:2 (6:2, 1:6, 4:6) | details | 13.02.2024 |
Argentina: Buenos Aires - Singles - Qualification |
| Final | Galan D. E. | Comesana F. | 2:1 (6:3, 5:7, 6:2) | details | 11.02.2024 |
| Semi-finals | Galan D. E. | Molcan A. | 2:0 (6:3, 7:66) | details | 10.02.2024 |
Argentina: Cordoba - Singles - Main |
| 1/16-finals | Galan D. E. | Munar J. | 0:2 (2:6, 4:6) | details | 05.02.2024 |
Australia: Australian Open - Singles - Main |
| 1/32-finals | Galan D. E. | Baez S. | 1:3 (5:7, 6:2, 2:6, 4:6) | details | 17.01.2024 |
| 1/64-finals | Galan D. E. | Kubler J. | 3:2 (2:6, 6:3, 7:63, 4:6, 7:68) | details | 14.01.2024 |
New Zealand: Auckland - Singles - Qualification |
| Semi-finals | Galan D. E. | Lestienne C. | CAN. | details | 06.01.2024 |
Australia: Brisbane - Singles - Qualification |
| Final | Galan D. E. | Tu L. | 0:2 (3:6, 65:7) | details | 31.12.2023 |
| Semi-finals | Galan D. E. | Kuznetsov An. | 2:0 (7:5, 6:3) | details | 30.12.2023 |
Peru: Lima 2 - Singles - Main |
| Quarter-finals | Comesana F. | Galan D. E. | 2:0 (6:4, 6:4) | details | 10.11.2023 |
| 1/8-finals | Giannessi A. | Galan D. E. | 0:2 (4:6, 3:6) | details | 08.11.2023 |
| 1/16-finals | Alves M. | Galan D. E. | 1:2 (6:3, 1:6, 65:7) | details | 07.11.2023 |
Ecuador: Guayaquil - Singles - Main |
| Final | Tabilo A. | Galan D. E. | 2:0 (6:2, 6:2) | details | 05.11.2023 |
| Semi-finals | Meligeni Alves F. | Galan D. E. | 0:2 (4:6, 65:7) | details | 04.11.2023 |
| Quarter-finals | Dellien H. | Galan D. E. | 0:2 (1:6, 2:6) | details | 03.11.2023 |
| 1/8-finals | Ymer E. | Galan D. E. | 0:2 (3:6, 2:6) | details | 02.11.2023 |
| 1/16-finals | Feldbausch K. | Galan D. E. | 1:1 RET. (3:6, 7:64, 0:5) | details | 31.10.2023 |
Belgium: Antwerp - Singles - Main |
| 1/16-finals | Barrere G. | Galan D. E. | 2:0 (6:1, 7:65) | details | 16.10.2023 |
Spain: Malaga - Singles - Main |
| 1/8-finals | Moro Canas A. | Galan D. E. | 2:0 (6:3, 6:4) | details | 12.10.2023 |
| 1/16-finals | Grenier H. | Galan D. E. | 0:2 (3:6, 5:7) | details | 10.10.2023 |
China: Shanghai - Singles - Main |
| 1/64-finals | Giron M. | Galan D. E. | 2:0 (6:4, 6:2) | details | 04.10.2023 |
China: Beijing - Singles - Qualification |
| Semi-finals | Arnaldi M. | Galan D. E. | 2:1 (4:6, 6:3, 7:612) | details | 26.09.2023 |
China: Chengdu - Singles - Main |
| 1/16-finals | Galan D. E. | Kotov P. | 0:2 (5:7, 5:7) | details | 21.09.2023 |
World: Davis Cup - World Group I - Singles - Main |
| | Krutykh O. | Galan D. E. | 2:1 (3:6, 6:0, 6:3) | details | 15.09.2023 |
| | Orlov V. | Galan D. E. | 1:2 (7:5, 3:6, 0:6) | details | 14.09.2023 |
USA: US Open - Singles - Main |
| 1/64-finals | Galan D. E. | Evans D. | 0:3 (4:6, 2:6, 5:7) | details | 29.08.2023 |
USA: Winston-Salem - Singles - Main |
| 1/16-finals | Galan D. E. | Baez S. | 1:2 (6:3, 4:6, 4:6) | details | 22.08.2023 |
| 1/32-finals | Albot R. | Galan D. E. | 0:2 (1:6, 5:7) | details | 21.08.2023 |
USA: Cincinnati - Singles - Qualification |
| Final | Kokkinakis T. | Galan D. E. | 2:1 (5:7, 7:67, 6:2) | details | 13.08.2023 |
| Semi-finals | Borges N. | Galan D. E. | 1:2 (65:7, 6:4, 5:7) | details | 12.08.2023 |
Austria: Kitzbuhel - Singles - Main |
| Quarter-finals | Etcheverry T. M. | Galan D. E. | 2:1 (66:7, 6:3, 6:4) | details | 03.08.2023 |
| 1/8-finals | Galan D. E. | Altmaier D. | 2:1 (3:6, 6:2, 7:68) | details | 02.08.2023 |
| 1/16-finals | Cecchinato M. | Galan D. E. | 0:2 (2:6, 2:6) | details | 31.07.2023 |
Germany: Hamburg - Singles - Main |
| 1/16-finals | Fils A. | Galan D. E. | 2:0 (7:5, 7:5) | details | 25.07.2023 |
Germany: Hamburg - Singles - Qualification |
| Final | Galan D. E. | Choinski J. | 1:2 (1:6, 6:4, 4:6) | details | 23.07.2023 |