Barcelona winger Ousmane Dembele "is a little boy who doesn't know how it all works", according to Kevin-Prince Boateng.
Boateng played alongside the 22-year-old during a six-month loan spell at Camp Nou last season, helping the Blaugrana retain the Spanish title.
Since completing a £136 million ($168m) switch to Barcelona from Borussia Dortmund in 2017, Dembele has struggled to live up to expectations at one of the world's biggest clubs.
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The France international has reportedly been disciplined on a number of occasions for missing training sessions, while failing to establish himself as a regular in Ernesto Valverde's starting XI.