Kazakhstan's Gennady Golovkin (3rd L) and Britain's Kell Brook pose during the weigh-in for their middleweight fight in London, on September 9, 2016. Brook, the reigning IBF welterweight champion from Sheffield with an unblemished record, is stepping up two weight divisions and Golovkin considers him his toughest test yet. The fight takes place at London's O2 Arena on Saturday, September 10. / AFP / ADRIAN DENNIS (Photo credit should read ADRIAN DENNIS/AFP via Getty Images)
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