In the headliner, heavyweight champion Tom Aspinall (15-3 MMA, 8-1 UFC) puts his title on the line against challenger Ciryl Gane (13-2 MMA, 10-2 UFC). In the co-feature, Virna Jandiroba (22-3 MMA, 8-3 UFC) meets Mackenzie Dern (15-5 MMA, 10-5 UFC) for the vacant women's strawweight title.

Check out the results from the official UFC 321 fighter weigh-ins, which feature a pair of title fights in Abu Dhabi.

It was a busy weekend for the ESPN divisional rankings, with no fewer than 13 ranked fighters in action between Saturday's UFC 320 and Friday's PFL Champions Series event. Among those fighting were half of the light heavyweight top 10,

In the headliner, heavyweight champion Tom Aspinall (15-3 MMA, 8-1 UFC) puts his title on the line against challenger Ciryl Gane (13-2 MMA, 10-2 UFC). In the co-feature, Virna Jandiroba (22-3 MMA, 8-3 UFC) meets Mackenzie Dern (15-5 MMA, 10-5 UFC) for the vacant women's strawweight title.

Tom Aspinall makes the first defense of his heavyweight championship in the main event of Saturday's UFC 321 card from Etihad Arena in Abu Dhabi. Aspinall, who was promoted from interim to full champion when Jon Jones retired and vacated the title, will defend his title against two-time title challenger Ciryl Gane.

UFC Fight Night 261 goes down Oct. 11, these power-rankings list every bout on the full fight card from best to worst.