The Sporting CP coach is regarded as favourite to succeed Jurgen Klopp at the end of the season.
Garcia told CBS: I had the opportunity to meet him on the coaching course we did together, he is very honest, professional and he has already proven it.
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"He can bring something different. He is a fantastic candidate."
However, former Reds teammate Jason McAteer says: He did a great job. He won the championship, he's respected, he's a young coach and he's had a decent career. But are you ready for the Premier League? I'm not sure. I don't think he's the right man."