But the tic-tac was quite historic for country guitar, and his sound that he invented for Cash's Tennessee Two produced a great effect.

NPR: Johnny Cash's 'Big River'

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.

BBC: Liverpool coach Borrell says academy 'was unacceptable'