Dana White unsure if Conor McGregor vs. Nate Diaz rematch 'will ever happen'

UFC 196 is, by some estimates, the most successful pay-per-view event in the company's history. Attempts at a rematch have been made, but none have been successful. That, said UFC President Dana White on Thursday's SportsCenter, gives him concern there may never be a rematch, despite effort on his part to make it happen.

"We're working on what's next for [McGregor]," White told SportsCenter host Cari Champion. "We're trying to set up a fight right now. It's been a little challenging. Obviously the fight he would love to do is the rematch with Nate Diaz. I'm trying to get the deal done."

McGregor and Diaz faced off in the main event of UFC 196 with Diaz winning by second-round submission. McGregor was originally slated to face UFC lightweight champion Rafael dos Anjos, but the 155 pound-champion withdrew less than two weeks out from the bout due to injury. Diaz filled in as an injury substitute, but the bout was moved to the welterweight division as a compromise during negotiations.

Still, White said, McGregor badly wants the rematch and a push to make the fight is ongoing. The good news, White noted, is there's desire from both sides to make the fight happen.

"Conor is obsessed with this rematch," White explained. "I don't know why, but he is. It's just his type of personality. He's obsessed with it. He's obsessed with fighting Diaz again, at 170 pounds."

That said, White expressed a degree of skepticism on whether such a rematch is possible at this point.

"I don't know if that will ever happen, but I'm trying," he lamented.