The Red Devils signed the Belgium international in a £75m deal from Premier League rivals Everton ahead of interest from defending champions Chelsea.
Lukaku has made an impressive start to the Premier League campaign after a return of four goals in four games to start to pay back his transfer fee.
The 24-year-old opened his Champions League account in a Manchester United shirt with the second goal in the Red Devils’ 3-0 win against Swiss side Basel.
Lukaku showed more movement throughout the European clash as he cut in from the wing to create problems for the Basel defence.
Former Chelsea midfielder Lampard, who was team-mates with Lukaku at Stamford Bridge, likened the Belgian forward to Arsenal legend Henry.
“He worked hard. He is intelligent. With Lukaku, you’re not going to get a delicate touch,” Lampard told BT Sport on Tuesday night.
“His size doesn’t allow it. He came in attacking from the right side is reminiscent of Thierry Henry back in the day.
“From those inside right areas, he can cut in on his left and score a lot of goals from that area.”
Lukaku scored 25 times in 36 games in the Premier League last season for Everton to attract interest from Chelsea and Manchester United.
The Belgium international has taken over the number nine shirt from Swedish legend Zlatan Ibrahimovic, who scored 28 times in all competitions last term.
Manchester United signed Benfica defender Victor Lindelof and Chelsea midfielder Nemanja Matic in the summer transfer window.
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