Unai Emery won his big reunion with Arsenal but 2-1 might prove a small reward for Villarreal, who failed to take advantage of Dani Ceballos being sent off in a frantic Europa League semi-final first leg on Thursday.
Manu Trigueros and Raul Albiol gave Villarreal a dream start at La Ceramica and the tie looked to be slipping away from Arsenal when Ceballos was shown a second yellow card early in the second half.
But 10-man Arsenal rallied and grabbed an away goal when Nicolas Pepe converted a penalty in the 73rd minute, before Villarreal’s Etienne Capoue also saw red with 10 minutes left to play.
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