The Argentinian played the full 90 minutes against Fulham just two days after arriving in London and looked right at home, making six tackles and two interceptions in the engine room.

The 22-year-old showed signs of huge promise on his first appearance at Stamford Bridge, adding energy and intelligence into our midfield.

After the match, the central midfielder sent a message to his new fanbase on his personal Instagram page...

'Very happy with the group’s effort. It is not the result we wanted, but let's keep working for the good results come,' he wrote.

'Thank you to the fans for the reception and support last night! I am very happy for the debut and to be a Blue! Thank You God!'