FILE - In this May 6, 2017, file photo, Canelo Alvarez, left, and Gennady Golovkin pose in Las Vegas. Alvarez against Golovkin is as good as it gets in the Sweet Science, a sport that is in the midst of a renaissance of sorts. They meet Saturday night, Sept. 16, 2017, in a middleweight title clash as highly anticipated by boxing purists as was McGregor's challenge of Mayweather to UFC fans. (Erik Verduzco/Las Vegas Review-Journal via AP, File)/Las Vegas Review-Journal via AP)
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