UFC Vegas 18 Results: After Over a Year Away, Seung Woo Choi Defeats Youssef Zalal LAS VEGAS, NEVADA - FEBRUARY 06: (R-L) Seungwoo Choi of South Korea punches Youssef Zalal of Morocco in their featherweight fight during the UFC Fight Night event at UFC APEX on February 06, 2021 in Las Vegas, Nevada. (Photo by Chris Unger/Zuffa LLC) Seung Woo Choi picked up his second straight win on the UFC Vegas 18 prelims, defeating Youssef Zalal via decision. Returning at UFC Vegas 18 was South Korea’s Seung Woo Choi, with the featherweight back in action for the first time since December 2019. Looking to put together two straight wins, Choi was up against Youssef Zalal, who was stepping in for Colin Angllin at the event. Who in turn had been replacing Steven “Ocho” Peterson.