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USA's Lilly King (L) poses with her gold medal next to silver medallist Russia's Yulia Efimova after she won the Women's 100m Breaststroke Final during the swimming event at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 8, 2016. / AFP / Odd ANDERSEN (Photo credit should read ODD ANDERSEN/AFP via Getty Images)

USA's Lilly King (L) poses with her gold medal next to silver medallist Russia's Yulia Efimova after she won the Women's 100m Breaststroke Final during the swimming event at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 8, 2016.   / AFP / Odd ANDERSEN        (Photo credit should read ODD ANDERSEN/AFP via Getty Images)