Michael Phelps
2010 Pan Pacific championships

At the 2010 National Championships, Phelps competed in five individual events. In the 200-meter freestyle, Phelps won ahead of Ryan Lochte in a time of 1:45.61. About an hour later, Phelps returned to the pool to win the 200-meter butterfly. But Phelps was not happy with his performance and called it the "worst" 200-meter butterfly of his life. In the 100-meter butterfly, Phelps won his 50th national title in 50.65. After the race, Phelps said he was "fairly pleased" with the result. In the 200-meter individual medley, Phelps finished second to Lochte 1:55.94 to 1:54.84. It was the first time Lochte had beat Phelps in a major national meet. In the 200-meter backstroke, Phelps finished in 4th place in 1:56.98.

On the first day of competition at the 2010 Pan Pacific Swimming Championships, Phelps opted out swimming in the final of the 200-meter freestyle to focus on the 200-meter butterfly. In the 200-meter butterfly, Phelps led from start to finish, coming in first with a time of 1:54.11. Although it was much slower than his 1:51.51 time from the previous year, Phelps had not lost a 200-meter butterfly final since 2002. On day two of the competition, Phelps swam in the heats of the 400-meter individual medley and contributed in the 4×200-meter freestyle relay. In the heats of the 400-meter individual medley, Phelps failed to make the A final, with Lochte and Tyler Clary taking the top two American positions. Phelps did not swim in the B final of the 400-meter individual medley. In the 4×200-meter freestyle relay, Phelps, with Peter Vanderkaay, Ricky Berens, and Lochte, finished first ahead of Japan and Australia. On day three of the competition, Phelps competed in the 100-meter butterfly and contributed in the 4×100-meter freestyle relay. In the 100-meter butterfly, Phelps finished first in a time of 50.86, a championship record. In the 4×100-meter freestyle relay, Phelps, with Lochte, Jason Lezak, and Nathan Adrian, finished first ahead of Australia and South Africa. As the lead-off leg in the 4×100-meter freestyle relay, Phelps set the championship record in the 100-meter freestyle with a time of 48.13. In his final event, Phelps swam in the 4×100-meter medley relay with Aaron Peirsol, Mark Gangloff, and Adrian and finished first ahead of Japan and Australia.
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