Are all the big stars losing at Rio so they can go home early because of Zika Virus? Defending champion Serena Williams is out of the 2016 Rio de Janeiro Olympics, after losing to 20th-ranked Ukrainian Elina Svitolina.
Williams lost to Svitolina 6-4, 6-3 in the third round, ending her bid to become the first tennis player to collect a pair of singles golds.
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