A pair of interesting matchups between former champions and rising stars will go down this December.

Former UFC light heavyweight champion Mauricio “Shogun” Rua will take on Alexander Gustafsson, while ex-UFC champ BJ Penn battles Rory MacDonald at UFC on Fox 5. USA Today confirmed news of the fights recently.

UFC on Fox 5 takes place December 8. The main event will be UFC lightweight champion Benson Henderson defending his title against Nate Diaz.

Rua (21-6) is coming off a win over Brandon Vera that he was hoping would propel him into a title shot. Instead, Lyoto Machida earned the next crack at the belt with his win over Ryan Bader.

Gustafsson (14-1) will be looking for another signature win. The youngster has been on the sidelines healing a minor injury over the past few months.

MacDonald (13-1) and Penn (16-8-2) were originally set to collide in September, but MacDonald was forced out after suffering a deep cut in training. Penn is returning to the Octagon after announcing his retirement last year.

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