LAS VEGAS -- If you had your hopes up for a Matt Hughes-Matt Serra rematch, well, sorry.

The retired former UFC welterweight champions, who coached against one another on the sixth season of The Ultimate Fighter, got into it over Twitter on Wednesday, challenging one another to a rematch.

But UFC president Dana White put a stop to the talk before it could really heat up.

"I get it, they don't like each other," White said Thursday. "It's not even a sideshow. Both great competitors, great champions. Matt Hughes is a guy who helped us build this thing, as did Serra. Serra was always a great guy to us. But this doesn't need to happen."

Hughes and Serra fought at UFC 98, with Hughes taking a unanimous decision. Hughes‘ last fight was a knockout loss to Josh Koscheck in Sept. 2011, and is a member of the UFC Hall of Fame. Serra, best known for his stunning upset of Georges St-Pierre to win the welterweight title at UFC 69, last fought in Sept. 2010, a decision loss to Chris Lytle.

Besides, it's been awhile since either fighter has attempted to make 170 pounds, prompting White to take a playful jab.

"Where are they going to fight, super heavyweight?"