Isi Fitikefu ’s UFC debut will have to wait. Fitikefu has been forced out of UFC Fight Night on Jan. 20 and Markus Perez (12-4 MMA, 2-4 UFC) will step in on short notice to face Dalcha Lungiambula (10-2 MMA, 1-1 UFC). A person with knowledge of the situation confirmed the booking to MMA Junkie, but asked to remain anonymous since the promotion has yet to make an official announcement.