WBO super flyweight champion Omar Narvaez (41-1-2, 21 KOs) retained his 115lb title for the eighth time with an easy tenth round TKO against Japan’s Hiroyuki Hisataka (22-11-1, 10 KOs) on Saturday night at the Gimnasio Municipal No. 1 in Trelew, Chubut, Argentina. The one-sided affair was waved off in the tenth round to save Hisataka from further punishment. This was strictly a showcase fight for the 38-year-old champion, who was fighting in his native Trelew for the first time since 2007. Hisataka has now come up short in four world title challenges.