UFC 317 takes place this Saturday as the main attraction of the UFC’s annual International Fight Week in Las Vegas. The event takes place at T-Mobile Arena and is headlined by two world title bouts.  In this segment of UFC 317 Countdown, the focus is on the main event lightweight title bout between former champion  Charles Oliveira and former featherweight titleholder  Ilia Topuria for the vacant championship.  UFC 317 Countdown: Topuria vs. Oliveira