That is the view of former Premier League boss Alan Pardew, who came up against Lukaku numerous times as a manager.
Lukaku joined Manchester United from Everton for £75million last month and scored on his competitive debut against Real Madrid in the European Super Cup loss last Tuesday.
He was the second top scorer in the Premier League last season with 25 but Pardew believes his hold-up play is something he must work on now he is at United.
“The thing about him is his power," Pardew said on Sky Sports.
Romelu Lukaku slammed on Twitter for foul throw against Real Madrid
Tue, August 8, 2017
Manchester United striker Romelu Lukaku has been savaged on Twitter after committing a foul throw against Real Madrid in the UEFA Super Cup
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Romelu Lukaku must improve at Man Utd, says Alan Pardew
Romelu Lukaku's hold-up play is probably his weak area, coming to Manchester, that is definitely an area he needs to improve
Alan Pardew on Man Utd star Romelu Lukaku
“If he gets in behind you, you are not going to catch him.
“His hold-up play is probably his weak area, coming to Manchester, that is definitely an area he needs to improve.
“His strength is goal scoring and particularly on crosses, I always thought he was a threat.
Romelu Lukaku must work on his hold-up play at Man Utd, says Alan Pardew
“The only time really you can gamble with him I think is when you’re high up the pitch.
“He has a tendency to come short and be a little bit lazy in his control and you can nick it off him.
“I think that is an area that he needs to improve."
Lukaku scored twice for United against West Ham on his Premier League debut for the club this afternoon, giving them a 2-0 lead just after half time.