Daisuke Naito won a unanimous decision over Xiong Zhaozhong of China on Tuesday to successfully defend the WBC flyweight title for the fifth time.

With the victory, Naito rewrote his own record for the oldest Japanese boxer to defend a world title at 34 years, 8 months. He improved his record to 35 wins, 22 by way of knockout, two defeats and three draws.

"I want to apologize for a poorly fought match but this was the extent of my ability. I still have a lot to work on," Naito said. "No one is weak in the world rankings. I didn't take my opponent lightly, but I realize how difficult boxing is."