Manchester United reportedly agreed in principle to sign Ansu Fati for €150million (£133million) last summer, only for Barcelona to call a halt to transfer discussions.
Fati, 18, is considered one of the most exciting prospects in European football and burst onto the scene with seven goals in 24 La Liga games last season.
He scored his first professional goal aged just 16 to become Barcelona's youngest ever goalscorer and the third-youngest in La Liga history.
Fati also became the youngest scorer in Champions League history after scoring the winner over Inter Milan aged 17 last December to put him firmly on United's radar.
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