Jamie Redknapp accused Manchester United of lacking identity after Ralf Rangnick's side fell to a 1-0 defeat at home to Wolves.
United were woeful in the first half at Old Trafford, and, although they improved in the second period, they ended up being beaten following a strike from Joao Moutinho in the in the 82nd minute.
Rangnick has struggled to get the best out of United's players since being appointed as interim manager, and Redknapp believes that the German's 4-2-2-2 formation doesn't work.
After a dour first half display, Rangnick switched to three at the back, but Redknapp says his tactics aren't working.