UEL 2018/19: Draw announced, Arsenal to face stiff test in the Quarter finals

Napoli will host Arsenal on April 11, while the reverse fixture will be played on April 18.
The other matches include an all Spanish encounter between Villarreal and Valencia, Benfica against Bundesliga side Eintracht Frankfurt and SK Slavia Prague's clash with Chelsea.
The Full Draw for the UEFA Europa League:
Napoli vs Arsenal
Villarreal vs Valencia
Benfica vs Eintracht Frankfurt
SK Slavia Prague vs Chelsea