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Brazil's Thomaz Bellucci celebrates after winning against Belgium's David Goffin during their men's singles third round tennis match at the Olympic Tennis Centre of the Rio 2016 Olympic Games in Rio de Janeiro on August 11, 2016.

Britain's Dan Norton, left, is tackled by Fiji's Osea Kolinisau, during the men's rugby sevens gold medal match at the Summer Olympics in Rio de Janeiro, Brazil, Thursday, Aug. 11, 2016.

Romania's Simona Gherman (R) competes against China's Sun Yiwen during the womens team epee gold medal bout between China and Romania as part of the fencing event of the Rio 2016 Olympic Games, on August 11, 2016, at the Carioca Arena 3, in Rio de Janeiro.

United States' gold medal winner Michael Phelps competes in the men's 200-meter individual medley final during the swimming competitions at the 2016 Summer Olympics, Thursday, Aug. 11, 2016, in Rio de Janeiro, Brazil.

United States' Michael Phelps celebrates winning gold in the men's 200-meter individual medley during the swimming competitions at the 2016 Summer Olympics, Thursday, Aug. 11, 2016, in Rio de Janeiro, Brazil.

Ma Long, of China, returns a shot to Zhang Jike, of China, during the men's table tennis gold medal match at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Thursday, Aug. 11, 2016.

Workers put up a set of Olympic rings ahead of the athletics competition in the Olympic stadium at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Thursday, Aug. 11, 2016.

China's synchronized swimming team take part in a training session at the Maria Lenk Aquatic Center at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Thursday, Aug. 11, 2016.

China's Wang Yihan returns a shot against Ireland's Chloe Magee during a women's badminton match at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Thursday, Aug. 11, 2016.

Venezuela's Albert Ramon Ramirez picks up Algeria's Abdelhafid Benchabla as they fight during a men's light heavy weight 81-kg preliminary boxing match at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Thursday, Aug. 11, 2016.

Turkey's Batuhan Gozgec, right, celebrates as he wins the match while Cameroon's Mahaman Smaila kisses the mat during a men's light welterweight 64-kg preliminary boxing match at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Thursday, Aug. 11, 2016.

Members of team Cuba attempt to block a ball spiked by Iran's H. Milad Ebadipour Ghara during a men's preliminary volleyball match at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Thursday, Aug. 11, 2016.

Rodolfo Cazaubon of Mexico leaps in the air to see his shot on the third green during the first round of the men's golf event at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Thursday, Aug. 11, 2016.