KSW 121: Stefan Vojčák becomes interim heavyweight champion

The KSW 121 event held in Liberec featured several significant results and notable moments in mixed martial arts. In the main event, Stefan Vojčák defeated Marcin Wójcik to become the new interim heavyweight champion. Following the bout, manager Artur Gwóźdź announced that Wójcik intends to return to the light heavyweight division.

Other key performances included Dominik Zadora, who secured a victory in his KSW debut against Samuel Bily by utilizing a wrestling and grappling strategy rather than his usual striking approach. Additionally, Michał Michalski earned a victory over Radosław Paczuski, and Kacper Formela defeated local favorite Leo Brichta.

The event also saw a controversial and unfortunate conclusion to the bout between Muslim Tulshaev and Kacper Koziorzębski. Tulshaev was unable to continue after receiving an accidental low blow from a spinning kick delivered by Koziorzębski near the end of the first round.