UFC 321 featured a pair of huge matchups in the top 10 of the UFC heavyweight rankings. On the main card, rankings stalwart Alexander Volkov looked to get closer to a title opportunity when he took on Brazilian star Jailton Almeida.

Walker landed a historic fourth straight heel hook submission in his prelim fight against newcomer Louie Sutherland. He has now tied with Rousimar Palhares’ record for most heel hook submissions in UFC history and is the first fighter to record four consecutively.

Following a disappointing ending during the main event between Tom Aspinall and Ciryl Gane at UFC 321, Andreas Hale gives a letter grade for every fight on the card.

Tom Aspinall vs. Ciryl Gane ended disastrously, but at least the inconclusive ending sets the stage for an immediate rematch. For four-plus minutes, Gane overdelivered against the undisputed champ, but an errant eyepoke brought UFC 321's main event to an unceremonious end.

Alexander Volkov may be next in line for whoever is the heavyweight champion after UFC 321, coming away with a close, debatable split decision victory over

The UFC 321 Main Card is heating up with this Heavyweight tilt. Check our UFC odds series for the Volkov-Almeida prediction and pick.