Sisto has now scored in Midtjylland’s last three Europa League games.
Marcus Rashford scores twice on debut.
Memphis scores his fifth goal in the European campaign.
United are unbeaten in ten European home games (W8 D2) since a 2-1 loss to Real Madrid in the 2012-13 Champions League
United score five goals in a European tie at Old Trafford for the first time since April 2007 (7-1 v Roma).