Mourinho has been quick to remind Chelsea fans on his previous returns to Stamford Bridge
"I am the manager I make these decisions, no fall out at all, no problem at all," says the Manchester United manager.
Expectations are high, but their return comes against a backdrop of continuing crisis.
The 20-year-old forward impressed for the Three Lions over the international break.
Jose Mourinho's third season at Chelsea and Madrid ended acrimoniously and a third campaign at United already looks like heading the same way
"I don't agree with Jose in terms of being disrespectful to them. This was not our intention, just to film what happened last season."
Mourinho's side were blown away on the south-coast as Brighton scored twice in two minute.
Lukaku hasn't featured for United since suffering his ankle problem against Arsenal last month.
"I don't agree. I agree that it wasn't a good performance at all (against West Brom); with that I agree."
Mourinho had claimed on Tuesday the near-£300m he has spent in 18 months at Old Trafford is not enough to compete with their neighbours, who have spent...
Sign up to receive our free newsletter