Arsenal secured top spot in Group A of the Europa League last night.
Kieran Tierney was on target as Mikel Arteta's side beat Zurich 1-nil to finish top and secure their place in the last 16.
Manchester United will have to play a potentially tricky knockout round play-off tie to reach that stage.
Although they beat Real Sociedad 1-0 away from home last night they needed a two-goal victory to secure top spot in Group E.
That play-off will be against a team coming down from the Champions League.
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Shamrock Rovers finished their Europa Conference League group campaign without a win.
Stephen Bradley's side lost 1-0 to Group F winners Djurgarden in Sweden.
That means they finished bottom of the group with just two points from six games.
West Ham beat FCSB 3-0 in Group B to finish top.
