Sergey Kovalev's greatest hits

Watch some of the best knockouts in the career of Sergey "Krusher" Kovalev, who fights Eleider Alvarez in Atlantic City on Aug. 4, 2018.

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Watch some of the best knockouts in the career of Sergey "Krusher" Kovalev, who fights Eleider Alvarez in Atlantic City on Aug. 4, 2018.