Gennady Golovkin and Kell Brook are both putting their undefeated records on the line when they face off against each other on September 10.
Brook, the current IBF welterweight champion, is taking on his Ukranian counterpart - who holds the WBA 'Super', IBF and WBC middleweight titles.
This will be the first time that the Sheffield-born fighter has taken to the ring at middleweight and he has been sent a warning from Golovkin ahead of the encounter.
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Golovkin, who has one win less than Brook over their respective careers, has warned the Englishman not to try and drag him into a slug-fest.
"I know that Kell is a good fighter, but I know my style and I am ready," Golovkin said recently, according to Sky Sports.
"I am very interested in what Kell will do. He will not fight like a street fighter because that would be a very short fight. If he is moving and dancing, maybe longer because I know I need time."
Golovkin seems excited by the fight.
"He [Kell] looks good, he is not a small guy. It's very interesting because Eddie Hearn said Kell will have a deal with you, he's already 160lbs. I said 'wow, this is interesting'," Golovkin added.
Golovkin is a knockout specialist, winning 32 of his 35 fights by stoppage. Moving up in weight, Kell Brook will need to be wary of that extra power when he comes up against the fearsome 34-year-old.