Chelsea have agreed to sign Enzo Fernandez from Benfica and will meet the midfielder's €120 million (£105m) release clause, according to ESPN sources.
Fernandez moves to Chelsea for a Premier League record transfer fee after impressing for Argentina as they won the World Cup last year. Fernandez was named the Young Player of the Tournament.
ESPN reported on Monday, that the 22-year-old had already agreed personal terms with Chelsea.
He becomes Chelsea's seventh signing of a busy January transfer window, following Benoit Badiashile, David Datro Fofana, Andrey Santos, Mykhailo Mudryk, Noni Madueke and Malo Gusto into the club.
The deal breaks the previous Premier League record fee of £100m that Manchester City paid for Jack Grealish when he joined from Aston Villa in 2021.