"They did spar together...he had to put some heavy hurt on him...he didn't get beat up...at this point, Sergey's the better boxer...I doubt it ever happens...I think the power is legitimate...there's things he hasn't learned as a fighter...his defense is really terrible," stated world-class trainer John David Jackson, who shared his thoughts on middleweight champion Gennady Golovkin. Check it out!
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