UFC president Dana White has announced Conor McGregor and Nate Diaz are officially out of UFC 200.
McGregor was due for a rematch with Diaz in Las Vegas on July 9, but uncertainty set in when he appeared to announce his retirement, though he later backtracked and, on Monday, claimed he would be present at the event.
However, White announced on Good Morning America on Wednesday that the main event at UFC 200 will be now see Jon Jones take on Daniel Cormier.
"UFC 200 has been interesting, to say the least. There's been some crazy things that have gone on, ups and downs," said White.
"Jon Jones fought on Saturday night and won his fight against OSP [Ovince Saint Preux] - he's been out for 15 months and now he's back and he wants his UFC light heavyweight title back, so the main event will be Daniel Cormier against Jon Jones."
Jones and Cormier have a long history with one another, dating back to UFC 178.
The pair were scheduled to fight and engaged in a brawl during a media conference before Jones pulled out of the event with a leg injury.
They fought in UFC 182 where Jones won in a unanimous decision, but a rematch in UFC 197 was cancelled when Cormier had to withdraw due to injury.