United States' Allyson Felix celebrates after winning the gold medal in the women's 4x400-meter relay final during the athletics competitions of the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, on Saturday.

United States' Matthew Centrowitz celebrates after winning the gold medal in the men's 1,500-meter final during the athletics competitions of the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, on Saturday.

Lindsay Whalen, left, and Maya Moore celebrate with teammate Breanna Stewart, right, during the U.S. women's basketball team's 101-72 win over Spain in the gold medal game Saturday in in Rio de Janeiro, Brazil.

United States' Diana Taurasi celebrates after making a three-point basket during the gold medal basketball game against Spain at the 2016 Summer Olympics in Rio de Janeiro, Brazil, on Saturday. The United States won its sixth consecutive gold medal.

Gwen Jorgensen, of the United States, waves after receiving the gold medal for winning the women's triathlon event on Copacabana beach at the 2016 Summer Olympics in Rio de Janeiro, Brazil, on Saturday.

Tervel Ivaylov Dlagnev, of the United States, is overcome by emotion after a semifinal loss to Komeil Nemat Ghasemi, of Iran, in a 125-kg freestyle wrestling match at the 2016 Summer Olympics in Rio de Janeiro, Brazil, on Saturday.

Netherlands' Yvette Broch scores a goal past the Norwegian defense during the women's bronze medal handball match between Norway and Netherlands at the 2016 Summer Olympics in Rio de Janeiro, Brazil, on Saturday.

New Zealand's Eliza McCartney competes in the women's pole vault final, during the athletics competitions of the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, on Friday.

China's Chen Long weeps after winning his men's badminton singles final match against Malaysia's Lee Chong Wei, at the 2016 Summer Olympics in Rio de Janeiro, Brazil, on Saturday.

Competitors enter the water during the women's triathlon competition of the 2016 Summer Olympics in Rio de Janeiro, Brazil, on Saturday. An American took the gold for the first time.

Australia's Alana Boyd celebrates after an attempt as she competes in the women's pole vault final, during the athletics competitions of the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, on Friday.

United States' David Lee celebrates during a men's semifinal volleyball match against Italy at the 2016 Summer Olympics in Rio de Janeiro, Brazil, on Friday.