Kell Brook has been backed to defend his title against Errol Spence Jr
The emeritus cruiserweight world champion is currently considering his next move after beating David Haye in March.
Bellew has spent time with Brook during the build-up to the fight and was once again present when Brook held a public workout in central Sheffield yesterday in bright sunshine with fans lining the ring to see him train.
Another former champion Johnny Nelson has questioned whether Brook will be able to ‘squeeze down’ to 147lb without losing too much strength or stamina.
But Bellew believes that when more than 30,000 head to Bramall Lane, home of Sheffield United, on Saturday, they will see a hometown victory for a very healthy Brook.
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“They’re all here for Kell,” Bellew told Betsafe.
“Sheffield as a city needs a sporting hero and they’ve got it in Kell.
“He’s a fantastic fighter.
“He’s got a formidable opponent in front of him but Kell is the more proven man at this stage of his career and I only see one outcome.
Tony Bellew has spent a fair a bit of time with Kell Brook ahead of his fight
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“He looks fantastic on the pads and is as shredded as I’ve ever seen him before.
“The veins are popping out of his arm – he looks like the Hulk!
“I think he can perform like the Hulk on Saturday night and he can do it.
“Kell understands what’s at stake and what to do.
Kell Brook worked out in front of fans in central Sheffield in bright sunshine
“I’ve seen him in camp and you look at him – he’s the picture of health.
“Usually at this stage of camp, he doesn’t. He looks perfect.
“He’d usually be tired and drained but he doesn’t.”
For the first time in his career, Brook will come into the fight on the back of a defeat having lost to three-belt middleweight champion Gennady Golovkin in September.
But the Brit still has 36 wins to his name compared to Spence’s 21-0 record.
The home fighter remains the 17/10 underdog for the bout despite being the champion but maintains he is not intimidated by his opponent.
“I use [the fact that he’s the favourite],” Brook said.
“He’s been doing big things in America and they’ve been tipping him as the next big thing.
“That goes over my head though.
“You’ve got to prove that to me on Saturday night.
“I’m going to go in there and show him why I’m the champion.”