Fernandez was a key part of the Argentina squad last winter as they won the FIFA World Cup against France on penalties.

Shortly after, he made the big-money move to Stamford Bridge from Benfica, and stood out in many games earlier this year.

Pochettino is now looking forward to working with his compatriot.

He told Chelsea fc.com: "It's a pleasure. I am proud of him [ Enzo Fernandez ] and our national team. I am so excited. I hope we can win many trophies together here."

Chelsea finished a lowly 12th in the Premier League last season, and they won't be playing European football next term.

This could be advantageous for Pochettino as he has extra time to prepare his team for the games without a hectic schedule.

The Blues won the league title the last time this happened. It remains to be seen whether Pochettino can replicate the same.

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