Predrag Rajkovic is essentially a decade younger version of Sergio Alvarez. The 19-year-old has some tremendous technical attributes at such a young age, and will develop into a fantastic keeper for years to come. The Serbian has already been capped by his country, and that tally will no doubt rise. Like Alvarez, his only potential weak spot is his speed, but at such a young age, that's nothing a little bit of specialist training can't fix.