Barcelona have officially confirmed the signing of highly rated Croatian midfielder Chelfi from Kustosija, according to reports from Sport and Marca. The 18-year-old, who emerged from Dinamo Zagreb’s youth system, will initially join Barcelona's Juvenil A (U19) squad. The initial agreement is for 50 per cent of Chelfi’s rights at a fee of around €300,000, with the total transfer sum potentially rising to €2 million based on performance bonuses and duration at the club. The contract is valid until 2027, featuring a release clause reportedly set at over €20m (£17m/$23m).