#2 Real Madrid - Mateo Kovacic
Mateo Kovacic has multiple UEFA Champions League and La Liga medals in his trophy room, but the Croatian will look at those baubles with scant fondness. The 23-year-old has had precious little to do with those victories, only serving as backup to Casemiro.
Real Madrid have added Marcos Llorente and Dani Ceballos to their first team midfield spots this season, and however great Zinedine Zidane is at rotating, Kovacic ought to be concerned that developing the Spanish youngsters might be the priority for Real Madrid, which would undoubtedly reduce his game time.
Kovacic was seen as a greater loss than Philippe Coutinho by Inter Milan fans when Madrid purchased the Croatian, which is a clue to what he can do on the pitch when made the main man. The talent is undoubtedly there - Kovacic just has to go to a club where the midfield is built around him. In a World Cup year, moving back to Serie A might just be the tonic to reignite his career.