#10. Fabio Coentrao
After making his transfer from Benfica to Real Madrid in 2011, Fabio Coentrao was termed as one of the best left backs at that time. With his ability to defend and attack valiantly, Conetrao was tipped to gain huge success with the La Liga outfit. While Real Madrid paid a staggering 30 Million Euros to acquire Coentrao’s signature, it eventually proved to be a huge disaster committed by Real Madrid transfer committee. With the rise of Marcelo along with his serious injury concerns, Coentrao could never cement his place in the Real Madrid starting XI. Currently a squad player for the Los Blancos, future looks bleak for the Portuguese left back.