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The Sheffield star defended his IBF welterweight title with a two-round destruction of Kevin Bizier last night.

Brook, 29, admits he needs to step up to prove how good he really is.

And he has piled the pressure on promoter Eddie Hearn to deliver him a major summer showdown.

He said: “If I cannot get in with a big name in the summer, I should hang the gloves up because I’m in the sport to unify titles and fight the best.”

Unification fights against WBC champion Danny Garcia or WBO title holder Jessie Vargas are possible while a clash with Timothy Bradley is also an option, depending on the outcome of his clash with Manny Pacquaio next month.

“Those big names excite me and I think they excite the fans,” he said.

“I don’t do boring fights and I’m more than willing to go to America and knock the best out or lay them out at Bramall Lane.

“It’s a massive division for big names and I want to face them all. People want to see me in these big fights and they are the fights I want.”

Brook breezed past mandatory challenger Bizier, viciously pouncing on the Canadian in the second round to extend his unbeaten record to 36 fights.

Bizier was sent to the canvas twice by right hands before referee Marcus McDonnell stepped in when it became clear the Canadian would not beat the count.

Despite Bizier being several levels below the defending champion, Brook’s trainer Dominic Ingle still believes his man is the best fighter to ever come out of their Wincobank Gym in Sheffield.

That’s a big claim considering his father, Brendan, moulded the career of hall of famer Prince Naseem Hamed as well as three other world champions in Johnny Nelson, Clinton Woods and Junior Witter.

“If I’m being really, really honest - and I’m not just saying this because he’s sat here - he’s probably the best out of the lot,” Ingle said.

“Naz was good and I spent a bit of time working with Naz. But I think Kell is a better boxer. He’s got a better variety of shots than Naz.

“Kell has been in the gym a long, long time and I’ve seen him develop from a 10-year-old kid into a world champion.

“He’s coming up to 30 now and only hitting his peak. He’s got another two to three years where he needs to get in the big fights.”

Brook added: “It is quite a statement. It was quite nice to hear. We have had some champions, some very good fighters and for him to put me in that bracket, I’m well pleased.

“But I haven’t even scratched the surface yet. There is much more to come from me with the right opponent and the right fight you’re going to see all of what I can bring.”