The Catalans are eager to add the 20-year-old wonderkid to their squad as they aim to fill the void left by Paris Saint-Germain’s world-record signing Neymar.
Dembele missed training without permission last week, and Sokratis has expressed his displeasure regarding the winger’s recent behaviour.
“Ousmane is a good guy. But he has to understand that no player is bigger than the team,” he told Kicker. “Everyone has to understand that he has to work for the team and fall in line. This also applies to Ousmane.
“He can’t do whatever he wants and should take Pierre-Emerick Aubameyang as an example. Auba also could imagine leaving. But he behaves professionally in every training session and every game and gives his best.
“In the first round of the cup he scored three goals, Ousmane wasn’t there. Ousmane has done no good by going on strike. He should not forget that he still has a long-term contract at Dortmund.”