Home EXCLUSIVE: Kathy Duva: Surviving The Boxing Business Kovalev has proved the doubters wrong reigning as unified champion from 2014-2016 Photo Credit: AP Photo/Tim Larsen

Kovalev has proved the doubters wrong reigning as unified champion from 2014-2016 Photo Credit: AP Photo/Tim Larsen

Duva's big break came in 1981, promoting the first encounter between Sugar Ray Leonard and Thomas Hearns Photo Credit: hannibalboxing.com

Kovalev has proved the doubters wrong reigning as unified champion from 2014-2016 Photo Credit: AP Photo/Tim Larsen

Former three-time WBO Light-Heavyweight champion Sergey Kovalev is the standout name at Main Events

Evan Holyfield is unbeaten in four professional fights Photo Credit: USA TODAY Sportsc

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