Chris Eubank Jr. claims 'Grade A' chin is invincible ahead of George Groves clash

Eubank Jr.: My 'untested' chin a huge compliment (2:57)

Chris Eubank Jr. explains why he has no problem with having an 'untested' chin as he prepares to face George Groves. (2:57)

Chris Eubank Jr. revealed the blueprint to knocking him out and unfortunately for upcoming opponent George Groves it doesn't involve a boxing ring.

Eubank Jr. (26-1, 20 KOs), who fights Groves on Saturday at the Manchester Arena, lost to Billy Joe Saunders via split decision back in Nov. 2014. However, despite the defeat to the now-WBO middleweight world champion, Eubank Jr. is yet to lose a fight via knockout and is adamant it will not happen throughout the duration of his career.

"The only time I've ever been knocked out in my entire life was in a rugby game when I was about 13," Eubank exclusively told ESPN.

"I used to play on the wing. The opposing winger has the ball in his hand and he's running full speed at me.

"I go down to tackle him and he jumps up and his knee hits my temple. That switched me off for about half a second, so I've gone out and hit the ground. I didn't even feel myself hit the ground.

"I woke back up about a second later and I'm looking around and everyone's clapping, 'ah great tackle Chris', so I had actually tackled him while I was out.

"I got up and one of my eyes was all fuzzy so even that, a guy flying knee in the temple, I was only out for a second and by then I had got back up after a second got back up on my feet and running around on the pitch again.

"I had a hell of a headache the next day but I have a solid chin. It doesn't need to be tested. It's been tested throughout my life and it always gets grade A results."

The winner of Groves-Eubank will progress to face either England's Callum Smith (23-0, 17 KOs) or Germany's Juergen Braehmer (49-3, 35 KOs), who fight in the other WBSS semifinal on February 24.