Let's take a look at Billy Gilmour against Man City (A), took him a while to get into the game, but you can see his immense potential.

One thing you'll notice very quickly about Gilmour is his touch, it's always positive and allows him to progress play with the right body orientation.
You've got top level DMs like Ndidi who haven't even mastered this. Awareness.

Does the same here with ease, takes the touch away from his man and can relieve the pressure, Chelsea build again.

Look how he creates this chance for Werner, immense brain, he's always available for the ball to be recycled, shame Werner thought he was Neymar and decided to slow down and stand up his defender.
That touch again followed by a perfect weight of pass.

Hadn't gotten into his groove, any other day he makes that pass to Werner and sets Chelsea 5v4 against City's backline, as his confidence grew so did his impact on the game.

Executes the pass to Azpi perfectly and Chelsea are able to gain territory, vital.
He's an option to recycle again, breaks lines and even moves off Rodri's blindside, the technical security he provides in the build up is fantastic.

He'll be a midfield general someday, here he reminds Werner of his role to block the passing lane into Rodri which was very instrumental to stifling City's build up.

Here he displays Controlled Aggression and shows Sterling into a crowded area, Chelsea regain and look at that technical security again, he'll sustain pressure on any defence with ease.
Good work from Pulisic too.

Displays top awareness here with genius in the build up, baits Jesus here with the intensity of his run then proceeds to use the space he leaves behind and he can switch it out effortlessly to James.
Proceeds to be an option between the lines.

Pay attention to him, he's always in a position to recycle the possession, offering a stabilising presence in deeper positions and, as always, connecting the positional structure together.

He's just 19???
By far my best moment of the game, top footballing brain, he knows the ball should go to Jorginho so he drags Gundogan away with his run, immediately he's an option to receive and break City's lines.
Dictating.

Look how he defends Jesus here, he's aware of his surroundings and of Jesus, shows him on his weaker side into a crowded area.
@Ball_Retention peep Jesus once he goes to ground.

Disallowed goal, but it all stems from his ability to retain the ball in tight spaces, the little touch to give Pulisic enough time to get beyond Dias and the pass, all perfect.

How many times does he scan here?
Like a top 6, he keeps on taking in information.

Has the diagonal over the top in his locker too, he'll create loads like this in his career.
Peep his orientation again, top notch.

He'll go right to the top, great understanding of various aspects of midfield play at such a young age, strikes the ball well and is combative, he'll always be limited by the fact that he's small though.