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RIO DE JANEIRO, BRAZIL - AUGUST 12: Rafael Nadal of Spain returns a forehand against Thomaz Bellucci of Brazil in the Men's Singles Quarterfinal on Day 7 of the Rio 2016 Olympic Games at the Olympic Tennis Centre on August 12, 2016 in Rio de Janeiro, Brazil. (Photo by Clive Brunskill/Getty Images)

RIO DE JANEIRO, BRAZIL - AUGUST 12:  Rafael Nadal of Spain returns a forehand against Thomaz Bellucci of Brazil in the Men's Singles Quarterfinal on Day 7 of the Rio 2016 Olympic Games at the Olympic Tennis Centre on August 12, 2016 in Rio de Janeiro, Brazil.  (Photo by Clive Brunskill/Getty Images)