A broken window on an official media bus after it shattered when driving accredited journalists to the Main Transport Mall from the Deodoro venue of the Rio 2016 Olympic Games in Rio de Janeiro, August 9, 2016. REUTERS/Shannon Stapleton.

Police escort an official media bus after a window shattered when driving accredited journalists to the Main Transport Mall from the Deodoro venue of the Rio 2016 Olympic Games in Rio de Janeiro, August 9, 2016. REUTERS/Shannon Stapleton

2016 Rio Olympics - Tennis - Preliminary - Women's Singles Third Round - Olympic Tennis Centre - Rio de Janeiro, Brazil - 09/08/2016. Serena Williams (USA) of USA reacts during her match against Elina Svitolina (UKR) of Ukraine. REUTERS/Toby Melville

2016 Rio Olympics - Tennis - Preliminary - Women's Singles Third Round - Olympic Tennis Centre - Rio de Janeiro, Brazil - 09/08/2016. Serena Williams (USA) of USA waves and leaves next to Elina Svitolina (UKR) of Ukraine after losing their match. REUTERS/Kevin Lamarque

2016 Rio Olympics - Artistic Gymnastics - Final - Women's Team Final - Rio Olympic Arena - Rio de Janeiro, Brazil - 09/08/2016. Lauren Hernandez (USA) of the U.S. competes on the floor exercise. REUTERS/Mike Blake

2016 Rio Olympics - Artistic Gymnastics - Final - Women's Team Final - Rio Olympic Arena - Rio de Janeiro, Brazil - 09/08/2016. Elissa Downie (GBR) of United Kingdom (R) is congratulated by her sister Rebecca Downie (GBR) of United Kingdom after her vault. REUTERS/Damir Sagolj

2016 Rio Olympics - Artistic Gymnastics - Final - Women's Team Final - Rio Olympic Arena - Rio de Janeiro, Brazil - 09/08/2016. Simone Biles (USA) of the U.S. competes on the balance beam. REUTERS/Fabrizio Bensch

2016 Rio Olympics - Artistic Gymnastics - Final - Women's Team Final - Rio Olympic Arena - Rio de Janeiro, Brazil - 09/08/2016. Simone Biles (USA) of USA after competing on the vault during the women's team final. REUTERS/Mike Blake