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Ralf Rangnick has warned bungling Manchester United defender Harry Maguire his form has not been good enough and that he must improve.

But the United interim boss has risked the wrath of supporters calling on Maguire to be axed, by admitting he is not ready to drop his struggling captain.

Fuming United fans have called on Maguire to be stripped of the skipper's armband and axed from the team following a string of below par performances in recent weeks.

The England defender has been at fault for several goals United have conceded during a woeful run of three games without a win, which has seen them lose ground in the race for the top four and crash out of the FA Cup.

Interim boss Ralf Rangnick claims Maguire, who became the most expensive defender in the world when he joined United from Leicester in an £80m deal in 2019, is struggling to adapt to playing in a back four.

But he has told him to raise his game to help United salvage something from what is turning out to be another shambolic season.

Rangnick, whose side host Brighton on Tuesday night, said: "I think after he came back after his injury he did extremely well, with a very good performance against West Ham.

"In the last two games he had some weaker moments, both against Southampton and when we conceded the goal against Burnley.

"He is our captain and I don't see any reason to change that, but he is a player who has to develop and get