Select tournament type
| 1/16-finals | Pankin S. | Pieczkowski O. | 2:0 (6:4, 7:65) | details | 25.11.2025 | ||
| Final | Fomin S. | Pieczkowski O. | 2:1 (1:6, 6:4, 6:3) | details | 16.11.2025 | ||
| Semi-finals | Pieczkowski O. | Marrero Curbelo I. | 2:0 (6:1, 6:3) | details | 15.11.2025 | ||
| Quarter-finals | Pieczkowski O. | Sels J. | 2:0 (7:5, 6:1) | details | 14.11.2025 | ||
| 1/8-finals | Pieczkowski O. | Mueller C. | 2:0 (6:1, 6:1) | details | 13.11.2025 | ||
| 1/16-finals | Pieczkowski O. | Stephens Z. | 2:0 (6:3, 6:2) | details | 12.11.2025 | ||
| Final | Ehrenschneider N. | Pieczkowski O. | 2:0 (6:4, 6:4) | details | 09.11.2025 | ||
| Semi-finals | Pieczkowski O. | Marrero Curbelo I. | 2:0 (6:2, 6:1) | details | 08.11.2025 | ||
| Quarter-finals | Jadoun N. | Pieczkowski O. | 0:2 (2:6, 1:6) | details | 07.11.2025 | ||
| 1/8-finals | Nedelko I. | Pieczkowski O. | 0:2 (3:6, 4:6) | details | 06.11.2025 | ||
| 1/16-finals | Kuperstein A. | Pieczkowski O. | 0:2 (4:6, 3:6) | details | 04.11.2025 | ||
| Semi-finals | Callejon H. S. | Pieczkowski O. | 2:0 (6:4, 6:4) | details | 26.10.2025 | ||
| Semi-finals | Pieczkowski O. | Sakellaridis D. | 1:0 RET. (7:64, 1:3) | details | 05.10.2025 | ||
| 1/16-finals | Pieczkowski O. | Ozolins K. | 1:2 (6:4, 5:7, 63:7) | details | 01.10.2025 | ||
| Pieczkowski O. | Norrie C. | 0:2 (4:6, 4:6) | details | 13.09.2025 | |||
| Pieczkowski O. | Fery A. | 0:2 (4:6, 2:6) | details | 12.09.2025 | |||
| Pieczkowski O. | Fearnley J. | CAN. | details | 12.09.2025 | |||
| 1/16-finals | Pieczkowski O. | Droguet T. | 0:2 (1:6, 2:6) | details | 03.09.2025 | ||
| Final | Pieczkowski O. | Kingsley C. | 2:0 (7:5, 6:4) | details | 02.09.2025 | ||
| Semi-finals | Pieczkowski O. | Covato M. | 2:1 (68:7, 7:5, 6:3) | details | 31.08.2025 | ||
| Semi-finals | Pieczkowski O. | Langmo C. | 1:2 (7:65, 64:7, 64:7) | details | 25.08.2025 | ||
| 1/8-finals | Pieczkowski O. | Prizmic D. | 0:2 (4:6, 2:6) | details | 06.08.2025 | ||
| 1/16-finals | Durasovic V. | Pieczkowski O. | 0:2 (3:6, 4:6) | details | 04.08.2025 | ||
| 1/8-finals | Pieczkowski O. | Binda A. | 1:2 (2:6, 7:5, 4:6) | details | 30.07.2025 | ||
| 1/16-finals | Palan D. | Pieczkowski O. | 0:2 (62:7, 5:7) | details | 29.07.2025 | ||
| Final | Soriano Barrera A. | Pieczkowski O. | 2:1 (7:64, 3:6, 6:3) | details | 21.07.2025 | ||
| Semi-finals | Tkemaladze Z. | Pieczkowski O. | 0:2 (2:6, 2:6) | details | 20.07.2025 | ||
| Semi-finals | Winter E. | Pieczkowski O. | 2:0 (7:63, 6:3) | details | 13.07.2025 | ||
| 1/8-finals | Pieczkowski O. | Soriano Barrera A. | 0:2 (4:6, 3:6) | details | 10.07.2025 | ||
| 1/16-finals | Pieczkowski O. | Palan D. | 1:0 RET. (7:5) | details | 08.07.2025 | ||
| Semi-finals | Pieczkowski O. | Added D. | 1:2 (6:4, 3:6, 4:6) | details | 28.06.2025 | ||
| Quarter-finals | Fernandes R. | Pieczkowski O. | 0:2 (4:6, 1:6) | details | 27.06.2025 | ||
| 1/8-finals | Luis T. | Pieczkowski O. | 0:2 (3:6, 1:6) | details | 26.06.2025 | ||
| 1/16-finals | Winter E. | Pieczkowski O. | 1:2 (4:6, 6:4, 3:6) | details | 24.06.2025 | ||
| 1/16-finals | Pieczkowski O. | Arutiunian E. | 0:2 (2:6, 2:6) | details | 17.06.2025 | ||
| 1/8-finals | Pieczkowski O. | Echargui M. | 0:2 (4:6, 1:6) | details | 12.06.2025 | ||
| 1/16-finals | Frydrych V. | Pieczkowski O. | 1:2 (3:6, 6:1, 3:6) | details | 11.06.2025 | ||
| 1/8-finals | Bakshi A./Pieczkowski O. | Agafonov E./Simakin I. | CAN. | details | 26.11.2025 | ||
| Quarter-finals | Javia D./Pieczkowski O. | Hussey G./Sels J. | WO. | details | 13.11.2025 | ||
| 1/8-finals | Javia D./Pieczkowski O. | Homberg M./Stephens Z. | 2:0 (6:4, 6:2) | details | 11.11.2025 | ||
| 1/8-finals | Javia D./Pieczkowski O. | Marrero Curbelo I./Ozolins K. | 1:2 (3:6, 7:66, 8:10) | details | 04.11.2025 | ||
| 1/8-finals | Latinovic S./Mikrut L. | Blanch D./Pieczkowski O. | 2:0 (7:67, 6:4) | details | 29.10.2025 | ||
| 1/8-finals | Caripi V./Pieczkowski O. | Jones A./Jones M. | 1:2 (7:63, 2:6, 8:10) | details | 30.09.2025 | ||
| 1/8-finals | Pieczkowski O./Singh K. | Krajci M./Nurlanuly Z. | 0:2 (4:6, 1:6) | details | 30.07.2025 | ||
| 1/8-finals | Palan D./Pieczkowski O. | Binda A./Simakin I. | 1:2 (3:6, 6:3, 3:10) | details | 09.07.2025 | ||
| Quarter-finals | Graca J./Marques D. | Pieczkowski O./Roveri Sidney G. | 2:0 (7:65, 7:5) | details | 26.06.2025 | ||
| 1/8-finals | Araujo P./Luis T. | Pieczkowski O./Roveri Sidney G. | 0:2 (3:6, 4:6) | details | 25.06.2025 | ||
| Quarter-finals | Coulibaly E./Nortey I. | Pieczkowski O./Singh K. | 2:1 (3:6, 6:3, 10:7) | details | 19.06.2025 | ||
| 1/8-finals | Pieczkowski O./Singh K. | Andaloro F./Rossi L. | 2:0 (6:3, 6:3) | details | 17.06.2025 | ||
| 1/8-finals | Dzhavakian Y./Ribeiro Lago E. | Alkotop Moh./Pieczkowski O. | CAN. | details | 11.06.2025 | ||