Israel Adesanya is concerned with Charles Oliveira's striking defense against Ilia Topuria. Oliveira (35-10 MMA, 23-10 UFC) meets Topuria (16-0 MMA, 8-0 UFC) for the vacant lightweight title in Saturday's UFC 317 main event (pay-per-view,

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.

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