Michael Phelps reacts after winning the gold medal. Photo: Reuters

Unstoppable: Michael Phelps takes Olympic Games gold medal tally to 21 with Rio de Janeiro double

The American added to his staggering title tally by first winning the 200 metres butterfly final before anchoring the US to victory in the 4x200m freestyle relay just over an hour later

Topic |   Rio Olympics 2016

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Michael Phelps reacts after winning the gold medal. Photo: Reuters
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