Stadium: Court 5 Round: 25 Ground: Hardcourt indoor
| Davis Cup | 2023/09/15 14:35 | Olaf Pieczkowski v Darian King | 1-6,7-6,6-3 |
| ITF M15 Szczawno | 2023/09/03 09:30 | Olaf Pieczkowski v Jasza Szajrych | 6-1,6-2 |
| ITF M15 Szczawno | 2023/09/01 09:00 | Olaf Pieczkowski v Jonas P Hartenstein | 6-2,6-2 |
| ITF M15 Szczawno | 2023/08/30 07:00 | Olaf Pieczkowski v Alan Bojarski | 6-0,6-2 |
| ITF M25 Poznan | 2023/08/23 13:45 | Olaf Pieczkowski v Viacheslav Bielinskyi | 6-3,3-6,2-6 |
| ITF M25 Bielsko Biala | 2023/08/18 08:30 | Juan Bautista Torres v Olaf Pieczkowski | 6-3,6-2 |
| ITF M25 Bielsko Biala | 2023/08/17 08:30 | Olaf Pieczkowski v Daniel Siniakov | 7-5,6-2 |
| ITF M25 Bielsko Biala | 2023/08/16 09:00 | Ondrej Horak v Olaf Pieczkowski | 6-3,1-6,0-6 |
| ITF M25 Plaisir | 2023/09/16 11:30 | Mats Rosenkranz v Anton Matusevich | 6-3,6-4 |
| ITF M25 Plaisir | 2023/09/15 12:00 | Anton Matusevich v Antoine Ghibaudo | 6-1,6-3 |
| ITF M25 Plaisir | 2023/09/14 09:00 | Anton Matusevich v Yanis Ghazouani Durand | 6-2,6-2 |
| ITF M25 Plaisir | 2023/09/13 07:55 | Jurgen Briand v Anton Matusevich | 5-7,6-7 |
| ITF M25 Sion | 2023/09/03 10:30 | Remy Bertola v Anton Matusevich | 6-2,7-5 |
| ITF M25 Sion | 2023/09/02 09:00 | Henry V-D Schulenburg v Anton Matusevich | 5-7,4-6 |
| ITF M25 Sion | 2023/09/01 13:50 | Anton Matusevich v Mika Brunold | 6-3,7-6 |
| ITF M25 Sion | 2023/08/31 08:00 | Tim Handel v Anton Matusevich | 3-6,4-6 |