![USA's Michael Phelps during a training session before the 12th FINA World Championships, at the Rod Laver Arena, in Melbourne, Australia, on March 23, 2007. Photo by Nicolas Gouhier/Cameleon/ABACAPRESS.COM Stock Photo - USA's Michael Phelps during a training session before the 12th FINA World Championships, at the Rod Laver Arena, in Melbourne, Australia, on March 23, 2007. Photo by Nicolas Gouhier/Cameleon/ABACAPRESS.COM Stock Photo -](https://c8.alamy.com/comp/2E749TM/usas-michael-phelps-during-a-training-session-before-the-12th-fina-world-championships-at-the-rod-laver-arena-in-melbourne-australia-on-march-23-2007-photo-by-nicolas-gouhiercameleonabacapresscom-2E749TM.jpg)
USA's Michael Phelps during a training session before the 12th FINA World Championships, at the Rod Laver Arena, in Melbourne, Australia, on March 23, 2007. Photo by Nicolas Gouhier/Cameleon/ABACAPRESS.COM Stock Photo -
![Michael Phelps looks at the score board after winning the 100-meter butterfly in the at the Arena Grand Prix swim meet in Charlotte, N.C., Friday, May 16, 2014. Phelps won the race Michael Phelps looks at the score board after winning the 100-meter butterfly in the at the Arena Grand Prix swim meet in Charlotte, N.C., Friday, May 16, 2014. Phelps won the race](https://c8.alamy.com/comp/2N4TYEE/michael-phelps-looks-at-the-score-board-after-winning-the-100-meter-butterfly-in-the-at-the-arena-grand-prix-swim-meet-in-charlotte-nc-friday-may-16-2014-phelps-won-the-race-with-a-time-of-5213-ap-photonell-redmond-2N4TYEE.jpg)
Michael Phelps looks at the score board after winning the 100-meter butterfly in the at the Arena Grand Prix swim meet in Charlotte, N.C., Friday, May 16, 2014. Phelps won the race
![US American swimmer Michael Phelps is seen prior to the men's 200 meter backstroke during the swimming short course world cup in Berlin, Germany, 23 October 2011. The short course world cup US American swimmer Michael Phelps is seen prior to the men's 200 meter backstroke during the swimming short course world cup in Berlin, Germany, 23 October 2011. The short course world cup](https://c8.alamy.com/comp/DADG0M/us-american-swimmer-michael-phelps-is-seen-prior-to-the-mens-200-meter-DADG0M.jpg)
US American swimmer Michael Phelps is seen prior to the men's 200 meter backstroke during the swimming short course world cup in Berlin, Germany, 23 October 2011. The short course world cup
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