The World Boxing Association said Thursday it has promoted Japan's Ryota Murata to its middleweight "super champion."The announcement comes a week after Mexico's Saul "Canelo" Alvarez vacated the title.Murata, the middleweight gold medalist at the 2012 London Olympics, became the WBA middleweight champion in 2017.The 34-year-old lost his second title defense against Rob Brant in October 2018 but regained the belt with a second-round technical knockout in a rematch with the American in July 2019.The WBA said it may recognize a fighter as a super champion under special circumstances, adding i…READ FULL ARTICLE