Dundalk manager Stephen Kenny has urged his players to drive on from the club's first Europa League win and make this a special season.
Zlatan Ibrahimovic's second-half winner off a miscued shot from Wayne Rooney summed up Manchester United's disjointed attack against Zorya Luhansk.
Inter Milan manager Frank de Boer blamed his players for starting their Europa League clash with "the wrong attitude" as they slumped to a 3-1 defeat.
Manchester United manager Jose Mourinho said that Wayne Rooney had given the team what they needed as s substitute in a UEL win against Zorya.
Petar Filipovic's header goes just wide of the post in Austria Vienna's scoreless draw against Viktoria Plzen.
Dundalk made history in the Europa League after forward Ciaran Kilduff came off the bench to seal three points in a 1-0 win against Maccabi Tel Aviv.