Keita's former Leipzig teammate Willi Orban believes that the Guinea international needs to be given special treatment in order to get the best out of him.
“Naby is a very sensitive guy who has to feel completely comfortable in his environment in order to perform well," Orban told Goal.
"You have to take special care of him, talk to him a lot. He needed breaks from time to time, when he was with us.
"The Premier League is certainly even more demanding in this regard."
However, asked about Keita's abilities, Orban was under no illusion about just how much he can add to Liverpool's midfield.
"Keita with his extraordinary ball control, his dynamism and his finishing. He was just complete."