My rundown on Iheanacho.
First Iheanacho's record:
CLUB RECORD: 15 goal 7 assists 1344 min of game time (actually 16 goals as he had one wrongly dissallowed).
NATIONAL TEAM RECORD: 3 goals, 2 assists in 5 games (total of 282 minutes) for Nigeria.
He had a so called poor game, yet scored 1 goal and had 1 assist, stole a record and became the youngest ever Manchester derby goalscorer.
I don't always know how he does it, but 18 goals and 9 assists rounds up to one assist every 180 minutes and one goal per 90 minutes.
He is equally prolific for club as well as country, does suggest this isn't pure luck.
My perception:
Iheanacho seems to be more confident or less overawed when he doesn't start, but when comes on as a sub. We know his passing and vision is very good, but what struck me vs ManUtd is how quickly he tried to get rid of the ball, make something happen, almost never giving himself a moment to breathe. It's as if the pressure to perform got the better of him. He tried to much, looked unsure of himself and his positioning, but still managed an assist and a goal in 54 minutes of play. It may also be that Iheanacho never was a sole striker, doesn't know how to play with his back to goal. He seemed a bit lost at times as he is more used to the second striker / attacking midfield role. When he received the ball with his back towards the goal he didn't know what to do with it. Why doesn't he try moves like he did in the U21 league (that maginificent turn vs Man Utd I believe).
Another thing I noticed and maybe I'm wrong on this: A lot of players don't seem to pass to him, even when he's in a good position. He's often screaming for the ball, but players like Nolito, Aguero, even de Bruyne won't pass it to him. Yesterday at times it almost seemed like he was surprised they passed him the ball. He's supposed to be the target man, but it seems like people are avoiding to pass to him and he ends up going deeper and deeper in search of a ball.
One thing I think we can all agree is that the one aspect he definitely something needs to improve on is his first touch. That is in my opinion his biggest flaw.
His biggest strength and the thing people don't talk about is his remarkable on-field intelligence, which is probably key to being in the right place and the right time, more often than not making the right decision. That was on show vs Stoke City, when in 7 minutes he effectively created 2 goals (one via the dummy that gave Nolito a free run on goal).