And while Rashford and Martial produced starring performances, Mourinho feels the fact they are such similar players means he is likely to keep rotating the pair and increase competition for places.
With more years left on the 20-year-old's contract, the supporters are yearning for more of his drug.
They were chosen to start together in the Premier League for the first time this season against Newcastle at Old Trafford on Saturday. I think we're on a path back to doing that. I just think at the moment having Lukaku in the team and obviously Zlatan [Ibrahimovic] coming back as well, I think it's good.
"You look at Rashford at the moment and he wants to extend himself to be as good as he can be, which is very, very good", he explained.
There was plenty to excite fans when the team news was announced before kick-off, with injury absentees Zlatan Ibrahimovic, Paul Pogba and Marcos Rojo all returning to the squad, as well as Anthony Martial and Marcus Rashford starting together in the league for the first time this season. It was the centre-back's first goal of the campaign and ensured Jose Mourinho's men were brimming with confidence going into the second half.
Rashford has been a prominent figure for the Reds this season with seven goals and four assists in 17 appearances.
"If you look at the talent that kid's got, it's absolutely frightening. He's got great feet, scores goals and creates goals", Cole told ESPN FC. Cole thinks so, but things are good at the moment, so no need to rock the boat with Martial's development and make him complacent, that's something Mourinho always tries to avoid.
Jose Mourinho has revealed that it is hard to play both Marcus Rashford and Anthony Martial in his Manchester United starting lineup as it leaves the side more open.
"You've got Rashford, you've got Martial - they're all quality players and they all know what to do".
However, while the Old Trafford faithful were both elated and impressed with his display, they also spotted an extraordinary play from Marcus Rashford, in the build up to his cushioned-header assist to Pogba.