#5 Nathan De Souza
Nathan De Souza is a 21-year-old Brazilian winger who signed for Chelsea in 2015. His signing was received well by a lot of fans because he was a young and exciting talent with a lot of potential. He has not quite lived up to his potential yet and is unlikely to ever reach the same if he stays with Chelsea.
De Souza was sent on his first loan spell just days after signing for the Blues. He spent 2 successful years at Chelsea's feeder club SBV Vitesse before going on loan to French club Amiens SC this summer. He struggled to get game time there and only played a few minutes for their first team. In January, his loan spell got terminated and he got sent to Portuguese club Belenenses FC.
Chelsea have a lot of great attacking options in their team right now so a player like De Souza is unlikely to ever get a chance.