Barcelona have beaten Manchester City and PSG to Frankie De Jong.
The Catalan giants have paid Ajax a sum of €86million for the Dutch midfielder.
He will join Barca at the end of the season after signing a five-year contract.
"FC Barcelona and Ajax have reached an agreement for the transfer of midfielder Frenkie de Jong, who will be joining the Catalan club from 1 July 2019.
"The cost of the transfer operation is 75 million euros, plus a further 11 million in variables. The player will be signing a contract for the next five seasons, through to 2023/24."