#4 Mateo Kovacic
It’s not often that a 24-year-old, three-time Champions League-winner is available for transfer, but it appears that Mateo Kovacic is keen to bring his time at Real Madrid to an end.
Having impressed for Croatia at the World Cup, midfielder Kovacic has openly stated how he wants to leave Los Blancos if he doesn't get more first-team assurances. Given that Real Madrid have arguably the best midfield trio on the planet – Casemiro, Toni Kroos, and Luka Modric – you can understand why the hugely talented Kovacic is struggling for game time.
Manchester United are one of the teams eyeing up a move for the Croatian, and his ability both as an attacking option and a deep-sitting playmaker would make him an attractive proposition for any team in the world. For Kovacic, he would literally have the footballing world at his feet should he go through with his plans to leave the Bernabeu.