Emi Martinez has established himself as one of the best goalkeepers in the world. The Argentine is a World Cup winner and he even won the Yashin Trophy last year off the back of his incredible performances for both club and country. The £20m man is truly a star these days, but it wasn’t too long ago that he was nothing more than a fringe player at Arsenal. Indeed, Martinez barely had a sniff at Arsenal for most of his eight years in north London, but after a run in the team towards the end of the 2019/20 season, he got a move to Aston Villa that would change everything. Speaking on the Sky Spo…