The Europa League draw made on Friday means Manchester United face a potential final with Inter Milan.
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The points deduction means LASK slipped from first place to second, three points behind defending champion Salzburg.
The Austrian Bundesliga is investigating allegations that league leaders LASK Linz flouted social distancing rules during a training session.
Odion Ighalo's fine form continued as he scored in Manchester United's 5-0 win over LASK Linz in the first leg of their Europa League matchup.