Paul Merson has questioned Manchester United's plan to appoint Ralf Rangnick as their interim manager until the end of the season.
The Red Devils moved for the highly-respected German coach, 63, following the sacking of Ole Gunnar Solskjaer.
Rangnick has been hailed as a 'football visionary for his 'Gegenpressing' style of football and has won seven trophies during his coaching career.
However, Sky Sports pundit Merson believes Rangnick faces a far more difficult challenge at Manchester United.
'Why do they need an interim manager? Because they don't know what they're doing at the moment, in my opinion,' Merson told Soccer Saturday.