Enzo Fernandez, a recent addition to Chelsea, will don the No. 5 jersey previously worn by Jorginho, who is now an Arsenal player.
The midfielder from Argentina has now landed in the UK, where he will finish his move from Benfica.
Fernandez joined Chelsea for an eight-and-a-half-year contract at a British transfer record price of €120 million.
In the summer of 2022, the World Cup winner transferred from River Plate to Benfica.
In 17 games in Primeira Liga, he has only one goal and five assists this season.
It is unknown if he will be eligible for selection when Chelsea plays Fulham in a Premier League match on Friday.