Federica Pellegrini wins his first gold medal of the World Swimming Championships . Phelps successfully defends his 200m butterfly title in a time of one minute 53.34 seconds 53.34 secs . China 's CNN takes silver while China 's Wu Peng won bronze . Federica Pellegrini adds women 's eight m freestyle to her 400m freestyle title .
Michael Phelps wins his first gold medal of the World Swimming Championships . Phelps successfully defends his 200m butterfly title in a time of one minute 53.34 secs . Japan 's Takeshi Matsuda takes silver while China 's Wu Peng won bronze . Federica Pellegrini adds women 's 200m freestyle to her 400m freestyle title .