In a 5-round flyweight championship bout in the main event, Alexandre Pantoja and Kai Kara-France meet Saturday at UFC 317 in Las Vegas.

In the main event, former featherweight champion Ilia Topuria makes the move to lightweight, where he'll take on former champ Charles Oliveira for the vacant title. Topuria vacated his featherweight title to pursue lightweight glory and he will enter the Octagon as a considerable favorite against Oliveira.

The previous encounter between the pair came in an exhibition bout on "The Ultimate Fighter" reality series in 2016, with Pantoja claiming a unanimous decision. The circumstances this time are far different,