Arsenal missed out on a Europa League final date with Manchester United after crashing out at the semi-final stage against Villarreal.The Gunners couldn’t find the one goal they needed to overturn a 2-1 first leg deficit as the sides played out a drab 0-0 draw at the Emirates.Mikel Arteta’s side came close to finding the breakthrough on several occasions, with Pierre Emerick-Aubmeyang hitting the post in the first-half.But in the end Unai Emery got one over on his old club to leave Arsenal facing the prospect of no European football next season for the first time since 1996.Daily Star Sport have highlighted two things Arteta got right and two things he got wrong on a disappointing night in north London.Kieran Tierney was one of Arsenal's.
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