Japanese boxer Ryomei Tanaka guaranteed himself a medal in the men's 48 to 52-kg flyweight category on Tuesday when scored a quarterfinal win over Colombian Yuberjen Herney Martinez Rivas at the Tokyo Games.The 27-year-old Tanaka defeated Martinez Rivas on a split decision at Kokugikan Arena, winning 4-1 on points to set up a meeting with Carlo Paalam of the Philippines in the semifinals on Thursday.Tanaka has earned at least a bronze medal on his Olympic debut as both semifinal losers are awarded the medal. Kiyoshi Tanabe was the last Japanese man to win an Olympic flyweight medal, taking …READ FULL ARTICLE