Olimpijske igre u Rio de Žaneiru

Daria Spiridonova of Russia competes on the balance beam during the women's qualifications.

Brazil's Marta, left, leaps over Sweden goalkeeper Hedvig Lindahl as she attempts a shot on goal during a group E match of the women's Olympic football tournament between Sweden and Brazil at the Rio Olympic Stadium.

Serena Williams, of the United States, reaches for a return against Daria Gavrilova, of Australia, at the 2016 Summer Olympics in Rio de Janeiro, Aug. 7, 2016.

Kosovo's Majlinda Kelmendi reacts after winning the gold medal of the women's 52-kg judo competition at the 2016 Summer Olympics in Rio de Janeiro, Aug. 7, 2016.

Hungary's Katinka Hosszu celebrates after setting a new world record and winning the gold medal in the women's 400-meter individual medley final during the swimming competitions at the 2016 Summer Olympics, Aug. 6, 2016.

United States' Michael Phelps swims during a training session prior to the 2016 Summer Olympics in Rio de Janeiro, Aug. 2, 2016.

American shooter Ginny Thrasher took gold in the women’s air rifle event in Rio, Aug. 6. 2016.

United States' Gabrielle Douglas trains on the uneven bars ahead of the 2016 Summer Olympics in Rio de Janeiro, Aug. 4, 2016.

Alessandra Perilli, of San Marino, competes during the trap women's qualification at the 2016 Summer Olympics in Rio de Janeiro, Aug. 7, 2016.

Russia's Yulia Efimova competes in a women's 100-breaststroke heat during the swimming competitions at the 2016 Summer Olympics, Aug. 7, 2016.

Fans of Mexico's Olympic football team cheer during a group C match of the men's Olympic football tournament between Mexico and Fiji at the Fonte Nova Arena in Salvador, Brazil, Aug. 7, 2016. Mexico won 5-1.