2016 Rio Olympics - Artistic Gymnastics - Final - Men's Vault Final - Rio Olympic Arena - Rio de Janeiro, Brazil - 15/08/2016. Ri Se Gwang (PRK) of North Korea holds his national flag after winning the gold. REUTERS/Mike Blake

2016 Rio Olympics - Artistic Gymnastics - Final - Women's Balance Beam Final - Rio Olympic Arena - Rio de Janeiro, Brazil - 15/08/2016. Simone Biles (USA) of USA stumbles during her routine on the beam. REUTERS/Mike Blake

2016 Rio Olympics - Artistic Gymnastics - Final - Men's Rings Final - Rio Olympic Arena - Rio de Janeiro, Brazil - 15/08/2016. Arthur Zanetti (BRA) of Brazil competes. REUTERS/Mike Blake

2016 Rio Olympics - Artistic Gymnastics - Victory Ceremony - Women's Balance Beam Victory Ceremony - Rio Olympic Arena - Rio de Janeiro, Brazil - 15/08/2016. Gold medallist Sanne Wevers (NED) of Netherlands (C), silver medallist Laurie Hernandez (USA) of USA (L) and bronze medallist Simone Biles (USA) of USA (R) pose on the podium. REUTERS/Mike Blake

2016 Rio Olympics - Artistic Gymnastics - Final - Women's Balance Beam Final - Rio Olympic Arena - Rio de Janeiro, Brazil - 15/08/2016. Sanne Wevers (NED) of Netherlands competes. REUTERS/Mike Blake

2016 Rio Olympics - Artistic Gymnastics - Final - Women's Balance Beam Final - Rio Olympic Arena - Rio de Janeiro, Brazil - 15/08/2016. Simone Biles (USA) of USA competes. REUTERS/Mike Blake

2016 Rio Olympics - Artistic Gymnastics - Victory Ceremony - Men's Rings Victory Ceremony - Rio Olympic Arena - Rio de Janeiro, Brazil - 15/08/2016. Gold medalist Eleftherios Petrounias (GRE) of Greece, silver medalist Arthur Zanetti (BRA) of Brazil and bronze medalist Denis Abliazin (RUS) of Russia pose with their medals. REUTERS/Mike Blake

2016 Rio Olympics - Artistic Gymnastics - Final - Men's Vault Final - Rio Olympic Arena - Rio de Janeiro, Brazil - 15/08/2016. Ri Se Gwang (PRK) of North Korea holds his national flag after winning the gold. REUTERS/Mike Blake