Poland hosted Wales away in the UEFA Nations A League Group 4 match.
Poland won the match played at Cardiff City Stadium 1-0 and finished 3rd in their group.
Swiderski scored the only goal that brought the victory to Poland in the 58th minute.
With this result, Poland finished the group stage in the 3rd place with 7 points, while Wales remained on 1 point and relegated to the B League.