Ralf Rangnick is statistically the worst Manchester United manager to have coached in the Premier League.
Ole Gunnar Solskjaer was sacked in October and Rangnick was appointed on an interim basis until the end of the season. Rangnick was short of recent coaching experience ahead of accepting the job, but it was hoped he could improve the club's fortunes.
However, United have been eliminated from the FA Cup and Champions League under Rangnick and they look set to finish outside of the top four in the Premier League. The experiment has been a disaster and his appointment hasn't worked.