The 2018–19 I Liga season was a turning point for him. In the first match against KKS Pro-Basket Kutno, he scored 28 points. Then, excluding one game, he regularly scored around 20 points. His "favorite" rival was SKK Siedlce, against whom he averaged 38 points in both matches. This achievement was especially noteworthy as Dziewa's coach Radosław Hyży took Dziewa out of the game early in order to give other players time to develop.[3]
Throughout the season, Dziewa averaged 22.2 points and 9.7 rebounds per meeting. In the last match against SKK Siedlce, his efficiency index was as high as 46.[3]
He was one of the cornerstones of the team that promoted to the Polish Basketball League in 2019.[4] Aleksander Dziewa got MVP of Polish 1st League.
With Śląsk Wrocław, as one of the key players Dziewa helped defeat Legia Warszawa 86:85 in extra time for the bronze medal match. The result superseded expectations. For this final game of the season, Dziewa praised the performance of both Elijah Stewart and Strahinja Jovanovic.[3] Aleksnader Dziewa won award for best Polish Player of the league in 2022.[5]
On July 12, 2023, he signed with Hamburg Towers of the Basketball Bundesliga.[6] He moved to Bundesliga after years of trying. Main key was 2022/2023 season in which he developed his 3pt shot under eye of polish development coach and assistant coach Maksym Papacz.[7] Dziewa increased his 3pt percentage by 8,3%. Averaged 32.5% (2020/2022) and 40.8% (2022/2023)[8]