Deontay Wilder was rushed to hospital after losing to Tyson Fury in their heavyweight title rematch.
After four rounds of Sunday’s mega Las Vegas contest, blood was seen coming out of the American’s left ear.
Each break in the fight saw Wilder’s camp tend to the wound as concerns he was battling on while concussed grew.
Wilder reacts to stunning TKO1:18
And with Fury in total control, his corner threw in the towel during round seven.
Although Wilder responded furiously to his camp’s decision, he was quickly taken to hospital as a precautionary measure.
Having been seen receiving stitches to his ear in the dressing room post-fight, he did not appear at his scheduled press conference and left the MGM Grand for checks.
“He had a small cut inside the ear,” Wilder’s head coach, Jay Deas, said. “May have affected his equilibrium, and so he’s just going to get a couple of stitches there.
“That’s really the extent of it. It was a tough, grueling fight with a tough, grueling fighter.”
Corner throws in the towel0:36
Post-fight, the Bronze Bomber spoke up his desire to reclaim his world championship belt immediately after the fight.
He stated: “I’m doing good. Things like this happen. The best man won tonight, but my corner threw in the towel and I was ready to go out on my shield.
“I had a lot of things going on heading into this fight. It is what it is, but I make no excuses tonight. I just wish my corner would have let me go out on my shield.
“I’m a warrior. He had a great performance and we will be back stronger.
“Even the greatest have lost and came back, that is just part of it. You just take it for what it is. I can make no excuses tonight. I had a lot of complications.