Konfrontacja Sztuk Walki has firmed up its second title fight for the promotion's first stadium show.
Poland's preeminent MMA promotion announced Monday that its May 27 “Colosseum” card from the PGE Narodowy Stadium in Warsaw will feature new KSW featherweight champion Marcin Wrzosek defending his title for the first time against slick-grappling Brazilian jiu-jitsu black belt Kleber Koike Erbst.

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The 29-year-old Wrzosek took the promotion's 145-pound title at KSW 37 in December, badly damaging Artur Sowinski's left eye in a bloody battle to force a second-round stoppage.