Eastern Europe has a reputation for producing great goalkeepers, and Koval could be the latest.
Aged 16 he made his debut for Metalurh Zaporizhya, and kept a clean sheet. 19 games later, he moved to Dynamo Kiev - the Ukrainian giants were so impressed by his performance against them they made his signing an urgent priority.
With first-choice keeper Oleksandr Shovkovskiy injured, Koval was thrust into the first-team, still just 17-years-old. His performances then, back in 2010, led Spanish football magazine Don Balon to name him as one of the best 100 young players in the world - alongside David De Gea, then of Atletico Madrid.
Shovkovskiy picked up another injury prior to Euro 2012, and once again Koval filled in, playing the final three games of the season. Shovkosvskiy has since returned to the first-team, but the number one jersey is now occupied by Koval. A huge talent, with experience of continential competition in the Europa League and a Ukraine Cup under his belt already.
Other four talented keepers on this list are Germans Marc-Andre ter Stegen from Borussia Mönchengladbach and Bernd Leno from Bayer Leverkusen, Belgian Thibaut Courtois who plays for Atletico Madrid as a goalkeeper on loan from Chelsea and Jack Butland from Birmingham City.
