#4 Lucas Perez - Arsenal
This may be a bit of a left field move for Real Madrid - but there is more to Lucas Perez than meets the eye. The Arsenal man has endured a miserable season in London - through no fault of his own. Perez has impressed in the few chances he has been afforded by Arsene Wenger, but was curiously deemed unsuitable for the Premier League by the French boss.
Perez is already sorting out his future elsewhere, and will surely be unable to turn down a move to Real Madrid. Los Blancos would get a La Liga-proven striker for dirt cheap, in addition to the fact that he will be fine being backup to Karim Benzema and will not kick up a fuss, thus preserving squad harmony.
Just two seasons back, Perez scored 17 times for Deportivo la Coruna in La Liga - he knows how to find the back of the net in Spain. Perez would represent a clever stop-gap signing, thus allowing Real Madrid to keep their powder dry for certain more 'blockbuster' signings.