KSW 89: Bartosinski vs. Parnasse was a mixed martial arts event that took place on Saturday, December 16, 2023 at the Prezero Arena in Gliwice, Poland.

KSW 91: Mircea vs. Brichta was a mixed martial arts event that took place on Saturday, February 17, 2024 at the Home Credit Arena in Liberec, Czech Republic.