Czech Republic: Ostrava - Singles - Qualification |
| Final | Nicod J. | Strombachs R. | 2:0 (6:2, 6:3) | details | 22.04.2024 |
| Semi-finals | Poljak D. | Strombachs R. | 1:2 (65:7, 6:1, 3:6) | details | 21.04.2024 |
Croatia: Split - Singles - Qualification |
| Final | Gill F. | Strombachs R. | 2:1 (6:1, 4:6, 6:3) | details | 08.04.2024 |
| Semi-finals | Markovina D. | Strombachs R. | 0:2 (2:6, 2:6) | details | 07.04.2024 |
Spain: Barcelona - Singles - Qualification |
| Semi-finals | Strombachs R. | Nijboer R. | 0:2 (3:6, 0:6) | details | 31.03.2024 |
France: Pau - Singles - Qualification |
| Final | Trotter J. K. | Strombachs R. | 2:0 (6:4, 7:5) | details | 19.02.2024 |
| Semi-finals | Gautier A. | Strombachs R. | 0:2 (3:6, 3:6) | details | 18.02.2024 |
United Kingdom: Glasgow - Singles - Main |
| 1/8-finals | Stewart H. | Strombachs R. | 2:1 (1:6, 7:5, 6:1) | details | 14.02.2024 |
| 1/16-finals | Strombachs R. | Matusevich A. | 2:0 (7:63, 6:1) | details | 12.02.2024 |
World: Davis Cup - World Group I - Singles - Preliminary |
| | Ruud C. | Strombachs R. | CAN. | details | 03.02.2024 |
| | Durasovic V. | Strombachs R. | 2:0 (7:5, 6:2) | details | 02.02.2024 |
Germany: M25 Nussloch - Singles - Main |
| Quarter-finals | Strombachs R. | Gray A. | 1:2 (7:5, 5:7, 4:6) | details | 26.01.2024 |
| 1/8-finals | Strombachs R. | Zahraj P. | 2:0 (6:3, 6:3) | details | 25.01.2024 |
| 1/16-finals | Strombachs R. | Van Herck L. | 2:0 (6:3, 6:1) | details | 24.01.2024 |
United Kingdom: M25 Sunderland - Singles - Main |
| 1/8-finals | Stewart H. | Strombachs R. | 2:1 (61:7, 6:4, 6:4) | details | 18.01.2024 |
| 1/16-finals | Houghton G. | Strombachs R. | 0:2 (5:7, 0:6) | details | 17.01.2024 |
United Kingdom: M25 Loughborough - Singles - Main |
| 1/16-finals | Pawelski M. | Strombachs R. | 2:0 (7:65, 6:4) | details | 09.01.2024 |
Luxembourg: M25 Esch/Alzette - Singles - Main |
| Quarter-finals | Chidekh C. | Strombachs R. | 2:1 (64:7, 6:2, 6:2) | details | 05.01.2024 |
| 1/8-finals | Oradini G. | Strombachs R. | 0:2 (62:7, 4:6) | details | 04.01.2024 |
| 1/16-finals | Giacomini L. | Strombachs R. | 0:2 (1:6, 2:6) | details | 03.01.2024 |
Egypt: M15 Sharm ElSheikh 20 - Singles - Main |
| 1/16-finals | Strombachs R. | Ivanov S. | 1:1 RET. (7:5, 63:7, 0:3) | details | 13.12.2023 |
Tunisia: M25 Monastir 9 - Singles - Main |
| Quarter-finals | Strombachs R. | Erel Y. | 0:2 (4:6, 5:7) | details | 24.11.2023 |
| 1/8-finals | Strombachs R. | Rosenkranz M. | 2:0 (6:2, 6:3) | details | 23.11.2023 |
| 1/16-finals | Strombachs R. | Wallner M. | 2:0 (7:63, 6:2) | details | 22.11.2023 |
Tunisia: M25 Monastir 8 - Singles - Main |
| Final | Strombachs R. | Habib H. | 0:2 (4:6, 4:6) | details | 19.11.2023 |
| Semi-finals | Strombachs R. | Moroni M. | 2:1 (6:0, 2:6, 6:3) | details | 18.11.2023 |
| Quarter-finals | Tabur C. | Strombachs R. | 1:2 (4:6, 7:5, 4:6) | details | 17.11.2023 |
| 1/8-finals | Coulibaly E. | Strombachs R. | 0:2 (4:6, 3:6) | details | 16.11.2023 |
| 1/16-finals | Vylegzhanin N. | Strombachs R. | 1:2 (6:4, 3:6, 3:6) | details | 15.11.2023 |
Egypt: M25 Sharm ElSheikh 5 - Singles - Main |
| Quarter-finals | Purtseladze S. | Strombachs R. | 2:0 (6:2, 6:3) | details | 10.11.2023 |
| 1/8-finals | Beckley A. | Strombachs R. | 0:2 (1:6, 4:6) | details | 09.11.2023 |
| 1/16-finals | Bar Biryukov P. | Strombachs R. | 0:2 (4:6, 4:6) | details | 08.11.2023 |
Egypt: M25 Sharm ElSheikh 4 - Singles - Main |
| Final | Bar Biryukov P. | Strombachs R. | 1:1 RET. (7:64, 4:6, 0:3) | details | 05.11.2023 |
| Semi-finals | van Wyk K. | Strombachs R. | 0:2 (2:6, 0:6) | details | 04.11.2023 |
| Quarter-finals | Raynel A. | Strombachs R. | 0:2 (2:6, 1:6) | details | 03.11.2023 |
| 1/8-finals | Stanke C. | Strombachs R. | 0:2 (2:6, 3:6) | details | 02.11.2023 |
| 1/16-finals | Henning P. | Strombachs R. | 1:2 (65:7, 6:3, 2:6) | details | 01.11.2023 |
Italy: Olbia - Singles - Qualification |
| Final | Copil M. | Strombachs R. | 2:1 (6:2, 4:6, 7:5) | details | 16.10.2023 |
| Semi-finals | Salomone F. | Strombachs R. | 0:2 (2:6, 5:7) | details | 15.10.2023 |
Spain: Malaga - Singles - Qualification |
| Final | Brancaccio R. | Strombachs R. | 2:0 (6:1, 6:3) | details | 09.10.2023 |
| Semi-finals | Strombachs R. | Geerts M. | 2:1 (6:4, 61:7, 6:4) | details | 08.10.2023 |
China: Zhuhai - Singles - Qualification |
| Semi-finals | Strombachs R. | Weber A. | 1:2 (6:4, 1:6, 64:7) | details | 19.09.2023 |
World: Davis Cup - World Group II - Singles - Main |
| | Wong C. | Strombachs R. | 0:2 (4:6, 66:7) | details | 17.09.2023 |
| | Wong Hong K. J. | Strombachs R. | 1:2 (3:6, 6:4, 3:6) | details | 16.09.2023 |