Paul Pogba told his agent Mino Raiola that if he is going to leave Juventus he only wants to play for Real Madrid, according to El Chiringuito.
That same report suggests that Juventus acknowledge that if Pogba wants to leave the club there's not much they can do to stop him, so the negotiations will begin soon and Pogba could probably end the summer being a Real Madrid player unless something big happens during the UEFA Euro.
Zidane plans to play Pogba in Kroos' current position, so the German would drop to the defensive midfield and Casemiro would become a reserve. This would allow Real Madrid to improve their offensive game with a much more possession-oriented style as Pogba would press the opponents high up the pitch and Kroos would not have to work as much in defense as if either James or Kroos were playing there.
Madrid could play around €100 million for the midfielder.