David de Gea has promised to speak about his failed 2015 transfer to Real Madrid when his career is over, implying that are still juicy unknown details to share.
De Gea was courted by Real Madrid for months leading into the summer of 2015, having established himself as one of the best goalkeepers in the world. A move back to his home city almost came to pass when Manchester United agreed a swap deal involving Keylor Navas.
