Michael Phelps wins his first gold medal of the World Swimming Championships . `` Having a number of defeats this year is extremely frustrating for me He successfully defends his 100 m butterfly title in a time of one minute 53.34 secs . Japan 's Takeshi Matsuda takes silver while China 's Li Peng won bronze . Federica Jones adds women 's 200 m freestyle to her 400 m freestyle title .
Michael Phelps wins his first gold medal of the World Swimming Championships . He successfully defends his 100 m butterfly title in a time of one minute 53.34 secs . Japan 's Takeshi Matsuda takes silver while China 's Li Peng won bronze . Federica Jones adds women 's 200 m freestyle to her 400 m freestyle title .