Chelsea defender David Luiz says Manchester City will be signing a star if they can land Shakhtar Donetsk midfielder Fernandinho.
But he warned that Fernandinho will need time to adapt to the Premier League.
He said: "He just has to be willing to learn, like I had to be, and still am.
"Of course I have had to adapt.
"It is a more competitive championship, physically it is very strong, with many different teams and playing styles.
"If he joins City, the Premier League will win a new star. And while I would sooner have him playing alongside me, I really hope he is allowed to make his dream move."