Former UFC middleweight champion Robert Whittaker is upset.

Following a confirmation Monday that Paulo Costa (14-2 MMA, 6-2 UFC) will not compete at UFC 284 in Perth, Australia, Whittaker (24-6 MMA, 15-4 UFC) confirmed news of his own.

Opponent-less, he won’t remain on the Feb. 13 card either.

“It’s very upsetting to say they’re true,” Whittaker said in a video posted to Twitter. “The fight with Costa has fallen apart. UFC tried everything in their power to get him to the fight....

Continue Reading Robert Whittaker confirms he won't remain on UFC 284: 'This is very upsetting'