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Manchester United striker Romelu Lukaku struggled to impress in Manchester United’s 1-0 Champions League loss to Juventus on Tuesday.

According to Arsenal legend Martin Keown, Lukaku should be roaring like a lion but he played like a pussy cat against Juventus.

“When Manchester United returned to the field for the second half against Juventus, Romelu Lukaku emerged from the tunnel much later than his team-mates,” Keown told Daily Mail. “He looked like he would rather have been anywhere else.

“This is a striker who is blessed with brute strength and electrifying pace. He should be roaring like a lion, but on Tuesday he played like a pussy cat — and not for the first time.

“Lukaku was bullied all night long by Giorgio Chiellini and Leonardo Bonucci, the Juventus centre halves. I cannot remember him winning a single contest in the air.”

Lukaku’s lack of movement against Juventus was also criticized by Keown.

Keown added: “Contrast Lukaku’s movement with that of Cristiano Ronaldo. The Juventus forward started on the left but often found himself in central positions. With United, everything seems fixed and wooden. Everyone is isolated.

“Lukaku looks like a traffic warden when he points at team-mates to tell them where to go but he does not offer any movement himself. When United’s full backs were in possession, Lukaku did not come across to the flanks to offer himself.

“He did not get into the box enough to threaten and when he did, he was heavy-footed and lacked the anticipation to get on the end of anything. Once you take away Lukaku’s pace and power, he does not give you much else.”