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| Michael Phelps of the US prepares for the 4 x 100m freestyle relay final. (STEFAN WERMUTH / REUTERS) |
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| Simone Biles of the US grimaces during her gymnastics training session on the weekend. (DAMIR SAGOLJ / REUTERS) |
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| Anna van der Breggen of the Netherlands celebrates winning gold in the cycling road race . (MATTHEW CHILDS / REUTERS) |
