RIO DE JANEIRO, BRAZIL - AUGUST 08: Juan Martin Del Porto of Argentina plays a backhand during the Men's Singles second round match against Joao Sousa of Portugal 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:  Juan Martin Del Porto of Argentina plays a backhand during the Men's Singles second round match against Joao Sousa of Portugal 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)