Borussia Dortmund boss Jurgen Klopp believes there is an evident similarity between newly-signed midfielder Kevin Prince-Boateng and striker Mohamed Zidan. Boateng joined the Bundesliga side on a six-month loan deal from Tottenham Hotspur last Sunday. "They are both talented players, but they need to be backed up, and that's my task," Klopp told Bild newspaper. German-Ghanaian midfielder Boateng failed to settle down at Premier League side Spurs, where he spent a dull spell on the fringes. Egypt hitman Zidan was pretty much in the same situation with Hamburg before sealing a move to Dortmund. Klopp stressed that treating players suitably is a matter of the utmost importance. "Every player has to enjoy good treatment," he said.