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 (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 - 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

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 in action against Caroline Wozniacki (DEN) of Denmark. REUTERS/Toby Melville

2016 Rio Olympics - Tennis - Preliminary - Women's Singles Second Round - Olympic Tennis Centre - Rio de Janeiro, Brazil - 08/08/2016. Caroline Wozniacki (DEN) of Denmark in action against Petra Kvitova (CZE) of Czech Republic. REUTERS/Toby Melville

2016 Rio Olympics - Tennis - Preliminary - Men's Singles First Round - Olympic Tennis Centre - Rio de Janeiro, Brazil - 07/08/2016. Novak Djokovic (SRB) of Serbia reacts during his match against Juan Martin Del Potro (ARG) of Argentina. REUTERS/Toby Melville