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Chelsea will face Slavia Prague, whereas there will be an all Spanish derby between Villarreal and Valencia.
Below is the full draw
Thursday 11 Apr 2019
19:00 Arsenal FC - England vs SSC Napoli - Italy
19:00 Villarreal CF - Spain vs Valencia C.F - Spain
19:00 SL Benfica - Portugal vs Eintracht Frankfurt - Germany
19:00 SK Slavia Prague - Czech Republic vs Chelsea FC - England
Arsenal or Napoli will meet Villarreal or Valencia in the semi-finals while Benfica or Eintracht play Slavia or Chelsea.