#4. Theo Hernandez
The unravelling of Hernandez has been painful to watch for those who had followed his rapid rise. The Frenchman is still just 21 and has the unique distinction of being signed by the two Madrid giants; Atletico where he started out and Real Madrid.
However, in the years he has been at these clubs, he has made a total of just 22 appearances (all at Real Madrid 2 seasons ago). He has spent a majority of his time out on loan at Deportivo Alaves and last season, at Real Sociedad.
His impetuous and headstrong nature has done him no favours as he has come across as difficult to manage. The fact that his elder brother, Lucas has gone on to become a regular at Atletico Madrid and World Cup winner with France before an €80m move to Bayern Munich this summer has made Theo's apparent decline even sadder.
The arrival of Mendy in a €48m move from Lyon and the emergence of Sergio Reguilon from La Fabrica means the days of Marcelo are numbered at the Bernabeu.
It also means that there is absolutely no chance that Theo will get a look-in and he will need to go elsewhere to rebuild his career.