He was a brilliant performer, then you say to yourself he always looks tired after one or two big runs
Gary Neville
However, Lukaku, who has been tipped to quit Old Trafford this summer and head to Serie A, failed to impress at Old Trafford.
And Sky Sports pundit Neville hit out at Lukaku after their draw with Chelsea, claiming the Belgium international isn’t fit enough to shine at United.
“Lukaku is the most interesting for me,” Neville told Sky Sports.
“You watch him for 25 minutes and he looks like a world beater. Then you see him make one big run and he looks absolutely shot.
Man Utd news: Romelu Lukaku has been slammed by Red Devils hero Gary Neville (Image: GETTY)
Man Utd: Hislop ‘not convinced’ Romelu Lukaku will stay at club
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“He was a brilliant performer, then you say to yourself he always looks tired after one or two big runs.
“He's a big decision. I've got very little sympathy for anyone who's unfit as a professional footballer.
“Football players, they're like a clock ticking, they should know their bodies inside out.
“You get to that point as a football player, there's a routine.