The draw for the last eight of the UEFA Europa League was conducted on Friday in Nyon, Switzerland.
The quarter-final first-leg ties will be played on April 11, with the second legs to be played on April 18.
The semi-finals will be held on May 2 and 9, with the final in Baku set for Wednesday May 29.
Below is the Europa League round of eight draw in full:
Napoli vs Arsenal
Villareal vs Valencia
Benfica vs Frankfurt
Slavia Prague vs Chelsea