Paul Scholes has described Aaron Wan-Bissaka as 'useless on the ball' in a scathing assessment of the Manchester United right-back.
Wan-Bissaka was one of several United players who performed well below the expected standard in Saturday's 2-0 home defeat to Manchester City.
Ole Gunnar Solskjaer set his team up in a 3-5-2 formation but Wan-Bissaka didn't excel in the wing-back role as City dominated from start to finish at Old Trafford.
Joao Cancelo, who's set up both of City's goals, gave Wan-Bissaka a torrid time and United club legend Scholes certainly wasn't impressed.
'I said before the 3-5-2 doesn't suit the players in the team,' he told Premier League Productions.
'Wan-Bissaka is useless on the ball - brilliant defender but useless on the ball at right-back.
'Three centre-halves today, none of them that good on the ball. Ole has got to find a way… There's a squad of players there that could be okay.'
Wan-Bissaka, who cost United £50million when signed from Crystal Palace in June 2019, has played in all but two of their games this season but hasn't contributed a goal or an assist.
He scored twice and set up six more goals last season.
Scholes also took aim at Solskjaer and the club's direction under his charge.
'The conviction has to come from the coach of the way you're going to play football,' he said. 'Ole has been here three years now and we've come here today not really knowing what he's going to do.
'That makes the recruitment almost impossible because you're not buying players for a system.
'Three years down the line you can see the evidence on the pitch - today and two weeks ago we are a long way off.
'I do think we've got a group of good players but Ole has to convince everyone that he is the right man to find the right formation for this team.
'Stop messing about changing it for everyone else. He's got to now have a conviction, whatever it is I don't care, just have that conviction.'
The derby defeat left United fifth in the Premier League table and they are already nine points adrift of leaders Chelsea as hopes of a title challenge fade.