UFC 31 will showcase Ilia Topuria facing off against Charles Oliveira for the vacant UFC lightweight title on Saturday. Here is what to know.

The main event will see a new lightweight champion crowned when Ilia Topuria battles Charles Oliveira for the vacant title. Topuria previously held the featherweight title in the

The vacant UFC lightweight championship is up for grabs at UFC 317, with Ilia Topuria vs. Charles Oliveira, with the flyweight title on the line in the co-main.