WBA/IBO Middleweight Champion Gennady "GGG" Golovkin (Left) hits the mitts held by his trainer Abel Sanchez (Right) in Los Angeles, California on October 15, 2014 at his open workout in preparation for his October 18, 2014 world title defense against WBC Interim Middleweight Champion Marco Antonio Rubio at Stub Hub Center in Carson, California and televised Live on HBO World Championship Boxing® beginning at 10:00 p.m. ET/PT. Both fighters took part in open workout sessions for the press. Photos by Gene Blevins/Hoganphotos.