Conor McGregor has lost to Khabib Nurmagomedov at UFC 229.
The Russian defeated The Notorious with a choke, making McGregor tap out.
The Irishman looked to go on the attack early in the first round but soon found himself on the canvas where he was dominated for the remainder of the session.
In the second, McGregor was rocked backwards by Nurmagomedov who then jumped at the chance to take the fight to the floor once again.
The challenger had a better third round as he landed with both hands, but the champion’s chin passed the test.
And in the fourth, McGregor was taken down again and tapped out.
McGregor, 30, was returning to the Octagon after a near two-year absence since he stopped Eddie Alvarez win the lightweight title in 2016.
He then took time off after becoming a father to Conor Jr the following May before taking on boxing legend Floyd Mayweather three months later.
McGregor was stopped in the 10th round but banked £100million for his efforts.
He then ran into controversy earlier this year when he and his entourage descended on a Brooklyn parking garage and attacked a bus carrying UFC fighters, including Nurmagomedov.
McGregor was arrested and charged before eventually agreeing a plea deal in July that enabled him to continue his career in America.
Shortly after that, his fight with Nurmagomedov was confirmed.