Manchester United legend Rio Ferdinand has taken aim at the performance of Romelu Lukaku.
Lukaku was criticised after Jose Mourinho's side drew 0-0 with Valencia in the Champions League at Old Trafford on Tuesday night.
Ferdinand told BT Sport: "When the ball is developing more in central areas of the pitch he just stands and really he's got to be moving even if he's sometimes standing offside.
"Make defenders think and at the moment defenders are seeing exactly where he is, he's not moving so you know what he's doing and for a defender that's a dream.
"You need players moving in behind, making your defender changing position and changing the eyeline."