And, last term, Ibrahimovic’s injury woes meant the mantle was passed to Lukaku.
The Belgium hitman signed from Everton in a huge £75million transfer and justified that fee by bagging 27 goals from 51 outings.
The MEN say that United are considering two players to replace Rashford as Lukaku’s deputy.
It is claimed the club retain an interest in Juventus’ Mario Mandzukic, who has impressed at the World Cup with Croatia.
The veteran may leave Juve due to the fact he sits below Gonzalo Higuain and Paulo Dybala in the pecking order.
And the chance to work under Mourinho, who admired him during his time at Inter Milan, may be too good to turn down.
Man Utd transfer news: Marko Arnautovic is interesting Jose Mourinho (Image: GETTY)
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Another player under consideration is West Ham’s Marko Arnautovic.
Arnautovic only moved to the London Stadium from Stoke last year, signing in a £25million deal.
Reports have claimed that United may need to fork out as much as £50m to land the Austria international.
Yet Mourinho knows all about him, having managed him before while at Inter.
Arnautovic left the San Siro, though, having failed to make an impact during a loan spell.
But that may not deter Mourinho, who feels the 29-year-old can be a crucial asset for United as they aim to end their agonising wait for the Premier League crown.