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RIO DE JANEIRO, BRAZIL - AUGUST 08: Serena Williams of the United States plays a forehand during the Women's Singles second round match against Alize Cornet of France on Day 3 of the Rio 2016 Olympic Games at the Olympic Tennis Centre on August 8, 2016 in Rio de Janeiro, Brazil. (Photo by Clive Brunskill/Getty Images)

RIO DE JANEIRO, BRAZIL - AUGUST 08:  Serena Williams of the United States plays a forehand during the Women's Singles second round match against Alize Cornet of France on Day 3 of the Rio 2016 Olympic Games at the Olympic Tennis Centre on August 8, 2016 in Rio de Janeiro, Brazil.  (Photo by Clive Brunskill/Getty Images)