Adam Idah can expect the stick as well as the carrot from Daniel Farke to ensure he stays grounded after his FA Cup heroics.

The teenage Norwich City striker produced a headline-grabbing display with a hat-trick in the 4-2 third round win at Preston on only on his second senior start.

Idah grasped his first team chance with Teemu Pukki injured, but his head coach insists the young Irishman will not be allowed to get carried away. Farke was confident enough to label Idah a 'natural born goalscorer' on the eve of his breakthrough milestone, but the City chief is prepared to dish out some tough love as well.

"We never get too high or too down. We have to keep in mind we didn't win the Premier League title, it was a FA Cup third round win against a Championship side with many changes," he said. "Adam made a good start. That is all.

"Don't worry I criticise him and tell him where he needs to improve but he also knows how to score and this is a gift. Sometimes you can't learn this. It is a natural instinct.

"That doesn't mean he has a brilliant career ahead if he doesn't keep on working hard, but if he improves he can really build on this. I remember the Crawley game, when it was not his best day. He scored an own goal and many were saying he was far away from the Premier League. But we backed him, we supported him and right now he delivered with a top class performance."

Idah was one of a number of shadow men who gave Farke a pleasing headache for the Premier League resumption at Manchester United on Saturday.

"I never had the feeling we would lose. From the first second to the last it was a professional, concentrated performance," he said. "The first topic is to go through but also it allowed some game time for the ones not so involved. That is why I was even prouder of the result.

"Maybe you coul say we were a bit sloppy in the last 10 minutes but we had made a lot of changes. I was told it was the first time in seven years we had reached this stage of the competition so that is pleasing. A difficult draw for us, a fifth game in 14 days against a side fighting for promotion."