Stadium: Court 1 Round: 44 Ground: Clay
| ITF M25 Ystad | 2023/08/16 13:25 | Oskar Jansson v Eero Vasa | 2-6,1-6 |
| ITF M25 Ystad | 2023/08/15 08:35 | Oskar Jansson v Lawrence Sciglitano | 6-1,7-5 |
| ITF M25 Ystad | 2023/08/14 10:55 | Oskar Jansson v Jan Simonsson | 6-4,6-4 |
| ITF M15 Hyvinkaa | 2023/08/01 07:00 | Jasza Szajrych v Oskar Jansson | 6-2,6-3 |
| ITF M15 Hyvinkaa | 2023/07/31 09:30 | Otso Martikainen v Oskar Jansson | 4-6,4-6 |
| ITF M15 Vejle | 2023/07/26 07:00 | Oskar Jansson v Luigi Sorrentino | 3-6,1-6 |
| ITF M15 Vejle | 2023/07/25 07:00 | Oskar Jansson v Henrik Heise Korsgaard | 1-6,6-4,10-6 |
| ITF M15 Vejle | 2023/07/24 09:30 | Oskar Jansson v Emil Chr E Mikkelsen | 6-2,6-3 |
| ITF M25 Las Vegas | 2023/10/16 13:00 | Warren Wood v Filip Pieczonka | 6-4,6-3 |
| ITF M15 Ithaca | 2023/10/02 16:30 | Filip Pieczonka v Drew Van Orderlain | 4-6,6-1,13-15 |
| ITF M25 Champaign | 2023/09/11 15:00 | Connor Bruce v Filip Pieczonka | 6-4,6-0 |
| UTR Pro Knoxville | 2023/09/02 14:30 | Filip Pieczonka v Michael Zhu | 3-6,4-5 |
| UTR Pro Knoxville | 2023/09/01 20:52 | Filip Pieczonka v Frank Thompson | 6-4,5-3 |
| UTR Pro Knoxville | 2023/08/30 21:42 | Filip Pieczonka v Nicholas Mangiapane | 6-2,6-3 |
| ITF M25 Poznan | 2023/08/21 09:00 | Michael Agwi v Filip Pieczonka | 6-4,2-6,10-7 |
| ITF M25 Poznan | 2023/08/20 09:00 | Ivo Vercik v Filip Pieczonka | 2-6,3-6 |