Former NBA player Amar'e Stoudemire (C) watches children play basketball during a workshop for youth entitled "Amar'e Stoudemire 2016 Basketball Peace Camp", days after arriving in Israel to play for Hapoel Jerusalem Basketball Club, in Jerusalem August 8, 2016. REUTERS/Ronen Zvulun

Former NBA player Amar'e Stoudemire smiles during a basketball workshop for youth entitled "Amar'e Stoudemire 2016 Basketball Peace Camp", days after arriving in Israel to play for Hapoel Jerusalem Basketball Club, in Jerusalem August 8, 2016. REUTERS/Ronen Zvulun

Former NBA player Amar'e Stoudemire poses for a selfie with children during a basketball workshop for youth entitled "Amar'e Stoudemire 2016 Basketball Peace Camp", days after arriving in Israel to play for Hapoel Jerusalem Basketball Club, in Jerusalem August 8, 2016. REUTERS/Ronen Zvulun

2016 Rio Olympics - Swimming - Preliminary - Men's 200m Butterfly - Heats - Olympic Aquatics Stadium - Rio de Janeiro, Brazil - 08/08/2016. Michael Phelps (USA) of USA is seen with red cupping marks on his shoulder as he competes. REUTERS/Michael Dalder

2016 Rio Olympics - Swimming - Preliminary - Men's 200m Butterfly - Heats - Olympic Aquatics Stadium - Rio de Janeiro, Brazil - 08/08/2016. Michael Phelps (USA) of USA competes. REUTERS/Michael Dalder

Michael Phelps of the US is seen with a red cupping mark on his shoulder as he competes in the Men's 4 x 100m Freestyle Relay Final at the 2016 Rio Olympics in Rio de Janeiro, Brazil August 7, 2016. . REUTERS/Dominic Ebenbichler/File Photo

2016 Rio Olympics - Swimming - Final - Women's 400m Freestyle Final - Olympic Aquatics Stadium - Rio de Janeiro, Brazil - 07/08/2016. Katie Ledecky (USA) of USA celebrates REUTERS/David Gray

2016 Rio Olympics - Tennis - Preliminary - Women's Singles Second Round - Olympic Tennis Centre - Rio de Janeiro, Brazil - 08/08/2016. Petra Kvitova (CZE) of Czech Republic celebrates next to Caroline Wozniacki (DEN) of Denmark after winning their match. REUTERS/Toby Melville