2016 Rio Olympics - Swimming - Victory Ceremony - Men's 1500m Freestyle Victory Ceremony - Olympic Aquatics Stadium - Rio de Janeiro, Brazil - 13/08/2016. Gold medallist Gregorio Paltrinieri (ITA) of Italy and bronze medallist Gabriele Detti (ITA) of Italy pose with their medals. REUTERS/Dominic Ebenbichler

2016 Rio Olympics - Swimming - Final - Men's 4 x 100m Medley Relay Final - Olympic Aquatics Stadium - Rio de Janeiro, Brazil - 13/08/2016. Michael Phelps (USA) of USA reacts after they won. REUTERS/Marcos Brindicci

2016 Rio Olympics - Swimming - Final - Men's 4 x 100m Medley Relay Final - Olympic Aquatics Stadium - Rio de Janeiro, Brazil - 13/08/2016. Team USA celebrates their win. REUTERS/Marcos Brindicci

2016 Rio Olympics - Swimming - Final - Women's 4 x 100m Medley Relay Final - Olympic Aquatics Stadium - Rio de Janeiro, Brazil - 13/08/2016. Team USA celebrates winning their gold medal. REUTERS/Dominic Ebenbichler

2016 Rio Olympics - Swimming - Victory Ceremony - Men's 4 x 100m Medley Relay Victory Ceremony - Olympic Aquatics Stadium - Rio de Janeiro, Brazil - 13/08/2016. Silver medallists Chris Walker-Hebborn (GBR) of Britain, Adam Peaty (GBR) of Britain, James Guy (GBR) of Britain and Duncan Scott (GBR) of Britain pose with their medals. REUTERS/Dominic Ebenbichler

2016 Rio Olympics - Swimming - Victory Ceremony - Women's 100m Medley Relay Victory Ceremony - Olympic Aquatics Stadium - Rio de Janeiro, Brazil - 13/08/2016. Team USA pose for pictures with their gold medals. REUTERS/Marcos Brindicci

2016 Rio Olympics - Swimming - Victory Ceremony - Women's 4 x 100m Medley Relay Victory Ceremony - Olympic Aquatics Stadium - Rio de Janeiro, Brazil - 13/08/2016. Silver medallists Emily Seebohm (AUS) of Australia, Taylor McKeown (AUS) of Australia, Emma McKeon (AUS) of Australia and Cate Campbell (AUS) of Australia pose with their medals. REUTERS/Stefan Wermuth

2016 Rio Olympics - Swimming - Victory Ceremony - Men's 4 x 100m Medley Relay Victory Ceremony - Olympic Aquatics Stadium - Rio de Janeiro, Brazil - 13/08/2016. Mitch Larkin (AUS) of Australia, Jake Packard (AUS) of Australia, David Morgan (AUS) of Australia and Kyle Chalmers (AUS) of Australia pose with their bronze medals. REUTERS/Dominic Ebenbichler