I don't remember him getting the better of his fullback. He managed to create some space against Rutter, the Brighton no.10, one time in order to make room for a cross, but from what I saw he tried to run at the fullback a couple of times, lost the ball, and then gave up trying because he wasn't getting anywhere. The stats show he didn't complete any dribbles or win any duels too, corroborating my interpretation.
And this is my issue with us throwing him in, it isn't a harmless dice roll, his biggest takeaway from this match is likely to be "I can't get past PL defenders", which will dent his confidence. It isn't his fault, he's a 17 year old kid against fully grown professional athletes, but if we sap his confidence in running at players this early it'll damage his development.