The Belgian experienced a blistering start to life at Old Trafford with 11 goals in his first 10 games but has since not found the back of the net in any of his last seven.
Romelu Lukaku has admitted it is a relief that he's got back into goalscoring ways with a double while on worldwide duty with Belgium.
At the end of last month Mourinho said Lukaku was "untouchable in my team" before saying "I have to protect my players when I feel they deserve it". However, he did bag a brace last night for Belgium, in an global friendly, and after the game he compared his abilities in the box to a leopard.
The Red Devils are set to welcome back Paul Pogba, Zlatan Ibrahimovic and Marcos Rojo in the coming weeks.
With Henrikh Mkhitaryan struggling of late, Ibrahimovic, who scored 28 goals last season, will help take the goalscoring burden off of Lukaku's shoulders.
"It motivates me really because he's another good player to add to the squad", Lukaku said while on worldwide duty. "We started by blowing teams away, being dominant and creating chances".
"That's the sort of thing you have to go through in the season, but now there are players coming back from injury and hopefully we can deliver performances even better than at the start of the season".
Lukaku's brace for Belgium means his season has started with an impressive 16 goals in 20 appearances for club and country, yet some doubts remain over his ability to perform on the biggest of stages.