#4 Mateo Kovacic
Kovacic's exit may be too recent to gauge the impact of, but, however, it is no doubt that he has left a big midfield hole in his wake. Although sparingly used last season, he was still instrumental in matches where one of Modric and Kroos was rested.
The Croatian showed his true brilliance in the 2017 Spanish Super Cup matches against FC Barcelona, where he looked calm, composed, and manipulative on the ball. His dribbles and pressing were the prominent features in his best displays for Real Madrid.
The Croatian Dynamo's loan move to Chelsea has left the reigning European Champions with a lack of depth in midfield this season. The only remaining cover for Kroos and Modric are Isco, who is more likely to often assume the left-winger's role, and Ceballos, whom fans are hoping to see step up to the challenge after a tough debut season.