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 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

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