#2 Kostas Manolas (AS Roma)

The Greek international has been one of the most consistent defenders in Serie A since his arrival at AS Roma. He also has good of experience of playing European football as well and he is only 27 years old.
The former Olympiacos defender has good physical strength and at the same time, he also has the speed to match quick attackers. While David Luiz clearly lacks the speed and concentration, Monolas on other hand has good concentration and alertness, which is necessary for a defender.
He has been linked with a move to Chelsea in the past but this summer Chelsea are clearly looking to overhaul their squad and the Greek defender should be a target for them, as his contract with Roma contains a release clause as well. Manchester United are also interested in bringing him to Old Trafford.
Monolas has the quality to be considered among the best defenders in the world, but the fact that AS Roma are not ambitious could make him consider to leave the Italian capital to a place where he can be considered among the best defenders in the world.