IT was the secret flaw that Jeff Horn tried to hide - but couldn't.
Now the Aussie boxing champ has revealed the true extent of his fears heading into his fight with Gary Corcoran.
In a first-person column for Player's Voice, Horn has revealed how he suffered a cut above his left eye before the WBO welterweight title fight with Brit Corcoran.
"It was the Monday two weeks before the fight. A jab snuck past my guard and it opened my head right up," he wrote.
"I had about three sparring sessions left to go at the time. They were cancelled. I couldn't risk taking another blow to the area."
It left Horn fearing a stoppage during the fight which could have costed him his belt - and his camp attempted to cover it up, literally, using a make-up artist.
But even with wife Jo helping use concealer over the spot to attempt to keep it a secret from Corcoran's camp, it was noticed.
"I tried to look on the bright side," Horn wrote.
"The plastic surgeon told me he was confident the skin would be as strong as normal. He applied some internal stitches that were nice and strong."
The surgeon ended up being right, as while the external layer of stitches did bust open, the internal layer didn't. But that didn't mean Horn wasn't concerned throughout the battle.
"I was being very, very cautious about our heads coming together and my head opening up. Sometimes it's hard to avoid when you're both coming in pretty quickly," he wrote.
"I remember him throwing his head around a few times and thinking, 'Whoa, whoa, whoa, that was so close to being a disaster.'
"He smiled at me a few times, but he didn't talk to me throughout the fight. He was more looking, and shooting me a glare at the end of rounds. I didn't know what that meant.
"Maybe it was the equivalent of puffing out your chest, trying to show that you think you're winning, but I felt confident that I had him covered."
Horn is now considering whether to take a big-money fight with an opponent such as Anthony Mundine or to battle mandatory challenger Terence Crawford.