The Belgium international has acquitted himself well throughout his first season at Old Trafford following a £75m move to Manchester United from their Premier League rivals Everton last summer.
The Manchester United striker scored 10 times in his opening nine games in all competitions to hit the ground running at the 20-time English champions despite concerns over his ability to perform for a top club.
Lukaku required 29 games to score his next 10 goals to prompt criticism of the Belgian striker but the 24-year-old has netted in his last two games in victories over Chelsea FC and Crystal Palace.
Speaking to Arsenal legend and Belgium assistant manager Thierry Henry during an interview with Sky Sports about life working under Mourinho, Lukaku shed light on why the centre-forward has earned the Portuguese coach’s trust.
“I think the manager in his mind thinks that I’m like his sergeant on the pitch, and that’s strange for a striker because it’s usually the midfielders,” Lukaku told Sky Sports.
“I’ve always worked hard and I’m grateful but at the end of the day, I’m a striker and I have to score goals.
“He has been really good but I think he knows I have that soldier mentality.”
Lukaku will be hoping to score for a third successive game when Manchester United welcome their bitter rivals Liverpool FC to Old Trafford in the Premier League on Saturday evening.
Manchester United are in second place in the Premier League table and two points ahead of Liverpool FC ahead of their meeting at Old Trafford.
MORE: Man United latest news
MORE: Arsenal latest news
MORE: Chelsea latest news
MORE: Liverpool latest news