KSW 91: Official results
MAIN CARD
- Valeriu Mircea def. Leo Brichta via submission (rear-naked choke) – Round 4, 2:40 – for interim lightweight title
- Dominik Humburger def. Adrian Dudek via TKO (strikes) – Round 2, 2:28
- Matus Juracek def. Henry Fadipe via TKO (strikes) – Round 1, 4:00
- Kacper Koziorzebski def. Viktor Cervinsky via unanimous decision (30–27, 30–27, 30–27)
- Lukasz Charzewski def. Michal Sobiech via unanimous decision (30–27, 30–27, 30–27)
- Dawid Kasperski def. Vasil Ducar via unanimous decision (30–27, 30–27, 30–27)
- Josef Stummer def. Adrian Wieliczko via submission (triangle choke) – Round 2, 4:28
PRELIMINARY CARD
- Mariusz Joniak def. Tobiasz Le via TKO (punches) – Round 1, 1:05
- Wiktoria Czyzewska def. Petra Castkova via TKO (body kick) – Round 1, 1:53