Hey Jibreil,
This is what i have gone for:
Arsenal vs Napoli --> advantage goes to Arsenal; on their home ground and have more testimonies in their favour.
Benfica vs Eintracht Frankfurt --> Good chance of a draw here, Frankfurt have been playing very well this season and Benfica have home advantage.
I also had a look at the other two matches as well.
Slavia Praha vs Chelsea --> Chelsea will win this one, may play more defensive but should not have many problems.
Villarreal vs Valencia --> Tempted to side with Valencia; probably the most uncertain game of the 4.
Taken from
here.