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RIO DE JANEIRO, BRAZIL - AUGUST 07: Jun Mizutani of Japan plays a Men's Singles third round match against Panagiotis Gionis of Greece on Day 2 of the Rio 2016 Olympic Games at Riocentro - Pavilion 3 on August 7, 2016 in Rio de Janeiro, Brazil. (Photo by Mike Ehrmann/Getty Images)

RIO DE JANEIRO, BRAZIL - AUGUST 07:  Jun Mizutani of Japan plays a Men's Singles third round match against Panagiotis Gionis of Greece  on Day 2 of the Rio 2016 Olympic Games at Riocentro - Pavilion 3 on August 7, 2016 in Rio de Janeiro, Brazil.  (Photo by Mike Ehrmann/Getty Images)