Reflecting on his team's performance, Borrell said: "To be fair United came with a very young side but we were too, with only four U18s on the pitch and the rest were all U17 with a couple of U16s.
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.