The 24-year-old former Barcelona, Juventus and Paris Saint-Germain striker may cut an imposing figure, but Lukaku has pledged not to be overawed by his presence in the dressing room.
The Belgium global has already scored four goals in four appearances for the 20-time English champions, which includes three goals in the Premier League. "I've got to go with Romelu Lukaku", Merson told Sky Sports News on Friday morning.
"I think when some people say "great draw", I don't think they know the difficulties of football, I think they don't know the history of these teams and what we are going to face, so for me, it's a hard draw and any team can get points in any match", he said. I think Zlatan is going to bring us a lot.
"I see Zlatan as important for the team".
The Belgian has made a fine start to life at Manchester United and despite missing a penalty against Leicester City last weekend, he has netted four goals in four appearances for the club already this season. I am now with a coach that I have wanted to play with for a long time, since I was 11 years of age.
His inclusion in the club's 25-man Champions League squad suggests his return could now be very near. And with him we are looking to do something special.
'I can not wait for him to resume playing again at Old Trafford'.