Anthony Joshua missed out on the chance to become a three-time heavyweight world champion after he was stopped by British rival Daniel Dubois in the fifth round.
Dubois, 27, knocked down Joshua towards the end of the opening round with an overhand right to the 34-year-old’s chin.
The IBF heavyweight champion then dropped Joshua at the end of round three and twice in the fourth.
A right hook ended the fight with a knockout for Dubois’ first defence of the title.
The fighters went toe to toe at London’s Wembley Stadium in front of a record 96,000 fans.
Minutes after retaining the IBF championship, Dubois shouted to the crowd “are you not entertained?” before saying: “I’m a gladiator, you know?
Anthony Joshua has chance at greatness, but must defeat ‘incredibly dangerous’ Daniel Dubois to become three-time world champion
“I’m just a warrior to the bitter end. I’m just ready to go. I want to go to the top level of this game and reach my potential. God bless you all.”
Joshua said the loss would not stop him from rebuilding despite admitting “we came up short”.
“You know I’m ready to kick off in the ring, but I’m going to keep my cool, keep very professional, and give respect to my opponent,” he said.
“I’m always saying to myself I’m a fighter for life… We keep rolling the dice. I had a sharp opponent, a fast opponent and a lot of mistakes from my end, but that’s the game.”
