Manager Jose Mourinho picked up on that when asked about the striker's dip in scoring form to make light of it, as he generally praised Lukaku's contribution.
The Belgian global arrived from Everton during the summer transfer window and began his season as a Red Devil in fine form.
The 24-year-old summer arrival began the season in sparkling form, finding the net in every game he played in for Belgium and United, bar one, from August 8 to October 10. This has caused both fans and critics alike to question as to whether or not he was worth the €84.70 million that Jose Mourinho shelled out to pry him away from Goodison Park.
Former United defender Ferdinand has backed Lukaku to rediscover his goal-scoring form, but insists the Belgium global must first learn to live with the pressure of vying for a spot with Ibrahimovic. "No, he's going to score soon".
Following the 1-0 win over Brighton at the weekend, Jose Mourinho said he "does not care" whether Lukaku scores or not as long as he works hard. If it's Saturday, Tuesday, next week, I don't know but he is going to score soon.More news: Tyrod Taylor carted to locker room with knee injury
"I just think it will do too much damage confidence wise because we are seeing somebody who has scored a lot of goals but has missed a lot of goals too". He is an awesome player and an wonderful professional. "I couldn't be happy with him".
With Manchester United playing Arsenal on Saturday in a crucial clash for both teams, especially with both teams needing a win, things could take a turn for the ugly.
"I don't think Jose Mourinho will be anxious about Romelu Lukaku's lack of goals, but I think ultimately he's got two big games coming up", Neville wrote in his Sky Sports column.
In his latest "Class of 92" diary, the Sky Sports football pundit said: "This is a critical stage of the season".