Manchester United hero Paul McGrath says their 7-0 thrashing by Liverpool was "unacceptable".
McGrath wrote for the Sunday World: "What a week it has been for Manchester United.
"Humiliated, there's no other word for it, by Liverpool last weekend they bounced back to surely sew up a place in the Europa League quarter-final with a fine win over Real Betis on Thursday night.
"Red Devils' supporters must have thought those sort of inconsistent outings were behind their team as they chased three Cups and a Champions League place in recent weeks.
"But last Sunday, everything that has been wrong with United this season jumped up to bite them, seven times.
"It is never acceptable for Manchester United to lose a match 7-0, but to lose 7-0 to Liverpool is unforgivable.
"Perhaps it was Liverpool's way of getting their fans back onside as they too were fighting back from a dreadful result, the 5-2 home loss to Real Madrid in the Champions League.
"I remember, as a United player, once losing a match 5-1.
"That was to the great Everton side of the mid-80's, of Neville Southall, Kevin Ratcliffe, Peter Reid and our own Kevin Sheedy.
"But we never lost like that to the Red half of Merseyside."
