You knew it wouldn't take Conor McGregor long to respond to the UFC's change of plans for Saturday's Dublin card.
Joseph Duffy, who was scheduled to meet Dustin Poirier on Saturday's main event in Ireland, had to withdraw from the fight Tuesday after it was discovered he suffered a concussion in training, leading to the bout's cancellation.
McGregor, the UFC interim featherweight champion, had made it clear in the weeks leading up to the event that he wanted to headline the card, which sold out Dublin's 3Arena in five minutes.