While the Belgian has faltered in his second season at Old Trafford, he cannot stop scoring for his country. And much of that is down to the form of Eden Hazard behind him.
The Chelsea star is arguably the best player in the Premier League right now. And how United could do with a footballer of his quality.
But perhaps they already have one, with Anthony Martial every bit as talented as the mercurial Belgian. What Hazard has that Martial does not is consistency, self-belief and the confidence of his manager.
Martial proved in his first few months at United that he has supreme talent. At the time, he also oozed confidence and ended his debut campaign with 17 goals and nine assists. Not bad for a teenager weighed down by a massive price-tag and the eyes of the world suddenly on him.
The Frenchman looked to be worth every penny and it seemed United had another gem on their hands.
The problem came when Louis van Gaal left and Jose Mourinho took to lambasting rather than nurturing the youngster.
Still only 22, Martial has years before he reaches his peak. He is five years younger than Hazard but has already experienced plenty of Premier League football. He also possesses the turn of pace and skill on the ball regularly showcased by the Belgian.
If United start utilising Martial effectively, he could grow into a player every bit as effective as Hazard is for Chelsea. Lukaku would benefit as a consequence, and so would the much-maligned Mourinho.
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