Summer sizzles when WORLD CHAMPIONSHIP BOXING: MIGUEL COTTO VS. YOSHIHIRO KAMEGAI AND REY VARGAS VS RONNY RIOS is seen SATURDAY, AUG. 26 at 9:45 p.m. ET/PT from StubHub Center in Carson, Cal., live on HBO. The doubleheader will be followed by the debut of the two-part behind-the-scenes series “24/7 Canelo/Golovkin,” which previews the Sept. 16 middleweight championship pay-per-view bout in Las Vegas.