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DOHA, QATAR - DECEMBER 03:Oussama Mellouli of Tunisia looks on during day one of the 12th FINA World Swimming Championships (25m) at the Hamad Aquatic Centre on December 3, 2014 in Doha, Qatar. (Photo by Francois Nel/Getty Images)

DOHA, QATAR - DECEMBER 03:Oussama Mellouli of Tunisia looks on  during day one of the 12th FINA World Swimming Championships (25m) at the Hamad Aquatic Centre on December 3, 2014 in Doha, Qatar.  (Photo by Francois Nel/Getty Images)