Anthony Joshua admits the fact he is conceding both height and weight advantages to American challenger Dominic Breazeale means he will have to adapt to hold onto his IBF heavyweight title.

Joshua has promised to wear his opponent down mentally in Saturday night’s clash at the O2 in London.

Breazeale recorded an 11lbs weight advantage at 18st 3lbs in Friday’s weigh-in at Covent Garden.

The challenger also enjoys a height advantage but Joshua is confident that he will find a way to tumble his opponent.

“Dominic Breazeale is an articulate man,” Joshua said at the weigh-in.

“There’s so much about the body – we train for weeks to get in shape – but he’s got a good mindset. I need to break him right down, defeat him mentally and the rest will fall.”

Joshua is 4.75 to win the fight during Rounds 4-6 while Breazeale is on offer at 13.00 to dethrone the champion.

Despite being a big underdog and knowing he will be facing a hostile home crowd in London, the American is adamant he will force Joshua’s army of fans into a rethink by the time the fight ends.

“This is Anthony’s hometown and I’ve got to expect that,” Breazeale said after he was booed at the weigh-in.

“The fans are going to have his back, but after Saturday night they’re all going to be my fans and I’m looking forward to it.

“In the end I’m going to knock out Anthony Joshua. That’s what I came here to do.”