Marcin Tybura prevails via submission at UFC Fight Night

Marcin Tybura used a rear naked choke to beat Tai Tuivasa by submission on Saturday night in their main event heavyweight bout at UFC Fight Night in Las Vegas.

Tybura (25-8-0) picked up the win just 4:08 into the first round. He has won eight of his past 10 fights, while Tuivasa (15-7-0) has dropped four straight.

In light heavyweight action, Ovince Saint Preux (27-17-0) downed Kennedy Nzechukwu (12-5-0) by split decision, with the cards reading 29-28, 28-29, 29-28. Christian Rodriguez (11-1-0) won a featherweight fight -- also by split decision -- topping Isaac Dulgarian (6-1-0).

Other winners Saturday included Macy Chiasson (10-3-0) and Gerald Meerschaert (36-17-0).