#4 Jan Oblak (Atletico Madrid)
Diego Simeone's Atletico Madrid is best known for its defensive prowess. The Argentine has crafted his squad to ensure that the Spanish side's defensive lines are capable of shutting out the most prodigious and potent of attacking talents.
At the heart of his tenacious defence is Slovenian shot-stopper Jan Oblak. Widely regarded as one of the best goalkeepers currently active in world football, Oblak has served as an extremely dependable last line of defence for Simeone's side.
In keeping with their tag of punching above their weight in Europe's premier competition, Atletico held Italian champions Juventus to a 2-2 draw at home. They also narrowly lost the reverse fixture in Italy by a narrow margin, in spite of some exceptional work by Oblak against the likes of Paulo Dybala and Cristiano Ronaldo.
Atleti squares up against reigning champions Liverpool in their Round of 16 fixture. While keeping the front three of Mohamed Salah, Sadio Mane, and Roberto Firmino goalless for 180 minutes is a monumental task, Oblak is probably one of the only goalkeepers in the world with the ability to accomplish it.