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 . Wu Peng was finishing very well - The U.S. team won its second consecutive world championship and third overall, beating Australia by two seconds to win their fourth straight title. Federica Pellegrini adds women 's 200m 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 . - The U.S. team won its second consecutive world championship and third overall, beating Australia by two seconds to win their fourth straight title. Federica Pellegrini adds women 's 200m freestyle to her 400m freestyle title .