Gary Cornish warns that his punch power is increasing all the time ahead of facing Anthony Joshua on Saturday.

The unbeaten Scot (21-0-KO12) is hoping to cause a major upset at The O2 and snatch the vacant Commonwealth heavyweight title and with pundits adamant he has little chance against the Olympic champion, there is a quiet confidence about the man from Inverness.

He told Sky Sports: "We try to improve every fight and after the last fight, my two coaches were telling me straight away to get back in the gym and improve on the things I did wrong. During my camp, my strength has gone through the roof. I'm beating all my personal bests every week.

"In sparring, the boys who I sparred with two years ago are saying to me that my power has come on a lot more. That's credit to my team, because they've put me through my paces in the gym and come up with some great things for me.

"We've been working hard in the gym trying different stuff and that helps in sparring. You get caught with shots in sparring but that's all part of learning. That's what we've been doing this camp - we've been learning throughout.

"What happens in sparring stays in sparring. You hear all these boys saying they knocked someone out in sparring but it's just sparring and it's there for learning. Throughout my career I haven't had much sparring but the last few fights I've had some and you've seen the difference.

"It's definitely the biggest stage I've fought on. It'll probably fire me up, to be honest. I've fought in England a couple of times. There was quite a big crowd at the Copper Box when I fought there. There's quite a big crowd coming down from Scotland for this, and they'll be vocal."

One man who is adamant that the British media and public alike have drastically underestimated Cornish's chances of shocking Joshua (13-0-KO13) is the man who manages the giant from Inverness - Tommy Gilmour.

Gilmour said: "It's not a problem for Gary. Gary's just a fellow who likes to train and fight. As his manager, I'm happy that he doesn't have to do big long interviews or big documentaries, because that's not really his thing.

"Over the last year, you can see marked improvement in all his fight - in technique and determination. I've never come across a fighter with a degree of confidence. There's no boastfulness or ego - he's just really looking forward to this on Saturday night.

"I see my man winning the fight. He's not taking it for the money. If I'd have given him another few fights before this then the money would have increased but Gary wants to be the first guy to burst Anthony Joshua's bubble.

"I think it's wonderful that two young athletes with undefeated records are prepared to box each other. That makes boxing fans the real winner. Matches like this have to be made. Dave Ryan v John Wayne Hibbert had to be made too because it's a great fight."