Ralf Rangnick questioned the refereeing and VAR over four decisions during Manchester United's 3-1 defeat at Arsenal.
United were denied a penalty when Cedric Soares handled inside the area with Arsenal 1-0 up and Cristiano Ronaldo was denied a second goal for offside at 2-1. Rangnick suggested the offside line was not conclusive to find Ronaldo offside.
Rangnick also noted Eddie Nketiah was in an offside position when he was directly in David de Gea's eyeline when Granit Xhaka struck the clincher in the 70th minute.