They had no tactical level, no understanding of the game," said Borrell, who spent 13 years at Barcelona, where he worked with Cesc Fabregas and Lionel Messi.
Borrell, who joined at the same time to coach the under-18s, said they have been working hard to introduce the practices that functioned to great effect at Barcelona's academy, which produced seven of the team who beat Manchester United in last year's Champions League final.