David De Gea
Spain’s De Gea emerged as one of the world’s top goalkeepers with Manchester United. He arrived from Atletico Madrid in 2011 after Sir. Alex Ferguson handpicked him to be the team’s starter. De Gea grew into his body to become a great shot-stopper and became a first-choice stopper for Spain.

Real Madrid watched De Gea’s progress with interest and had annual links to the keeper. Finally, they moved for him in 2015 but the deal fell apart. Somebody made a horrible administrative error as they failed to register him before the transfer deadline at 10 pm. It devastated De Gea and he never got that dream move to one of Spain’s top teams (via Daily Star).