The Sao Paulo midfielder has already agreed to join the club in January but admits it is difficult not to think ahead.
He said: “It is clear that I am focused to help my club São Paulo in the Brasileirão and Copa Sudamericana.
“But I do regularly think the challenges that lie ahead. I imagine the fact I will have lack of friends and my family.”
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Liverpool have unveiled their new home kit for next season, sticking with the hugely popular retro styling of the current shirt.
The reputation of the Premier League means it is the most popular and one of the most watched leagues in the world.