Gennady Golovkin, left, hits Canelo Alvarez during a middleweight title fight Sun., Sept. 17, 2017, in Las Vegas.
Gennady Golovkin, left, hits Canelo Alvarez during a middleweight title fight Sun., Sept. 17, 2017, in Las Vegas. John Locher AP
Gennady Golovkin, left, hits Canelo Alvarez during a middleweight title fight Sun., Sept. 17, 2017, in Las Vegas. John Locher AP