Can Arsenal get past former boss Unai Emery and reach the Europa League final? (Adam Davy/PA)
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Arsenal face their third Europa League semi-final in four years when they come up against Villarreal and former head coach Unai Emery on Thursday evening.
With their inconsistent Premier League form leaving them some way off the top four, winning the Europa League seems the only likely way for manager Mikel Arteta to take the Gunners back to the Champions League.