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 UFC 317 fight between Ilia Topuria and Charles Oliveira will be available through pay-per-view in the US on ESPN+. ESPN+ subscribers can opt to add it on to their monthly plan ( click here to see how ), and it's a $79.99 add-on to the monthly subscription.

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.