Japanese star swimmer Kosuke Kitajima set a new world record time of 58.91 seconds on his way to getting the gold in the 100m breaststroke Monday.

• 日本蛙泳选手北岛康介以58秒91的成绩夺冠并打破世界纪录，捍卫了自己4年前在雅典获得的世界冠军头衔。