Head coach David Wagner gave an honest assessment of this afternoon's result and discussed new signings as well as players returning from injury after the international break.
"It was not the performance we wanted, especially in the first half.
"We were miles off; we were not switched on, not focused, not as energetic or as sharp as we have been in the past.
"Everything was there in the second half, so it couldn't be a fitness problem.
"We deserve the defeat because of the first half.
"I am angry, disappointed because of the first half; this should not happen."
The Canaries will lose a number of first-team and academy players during the international break, with two weeks until the next Championship fixture.
"You have to take it how it is, maybe it's good to have to think about it for more than a few hours, because usually the next game is only just around the corner, so you move on quickly.
"I would love to have the whole team all together but at the end of the day we have to take it. We had a good start this season, although, after today it doesn't feel that way, but this is a reality check and this is where we will learn.
"You have to be there for every part of the game, if not, you will struggle in the Championship.
"This is our reality check and now we feel it for a bit longer.
"There are a lot of games to come, included our next two which are interesting fixtures in Leicester and Stoke at home."
Speaking on the new summer signings and players out with injuries, Wagner said: "Adam Forshaw played 45 minutes for the Under-21s today, which was what we wanted.
"He also got 20 minutes in the cup this week and he will have a further two weeks of training, maybe another Under-21s game before his pre-season is done.
"It looks like Borja \[Sainz\] is back in training as well.
"Lungi \[Sørensen\] will take maybe another week or two before he is back in training and Onel \[Hernández\] is back in training next week.
"Although, if they are back in training, it doesn't mean they are back in the squad.
"Like Borja, for example, will need four or five weeks more of training before he can be in contention."
During the final day of the transfer window, City signed Ui-jo Hwang on loan from Nottingham Forest and Danny Batth on a permanent deal from Sunderland.
"We had to react to Josh's injury which is a serious one; he needs surgery, which will be done on Monday.
"He will be out until Christmas or January, which is why we had to react.
"Hwang is exactly the striker that fits our idea; he can run in behind and has good link up play, is quite tall and he works his socks off."
"Late yesterday, we got a great offer which we accepted for Andy \[Omobamidele\] and then we had to react quickly and we filled this gap with Danny \[Batth\].
"We are very happy with these two transfers and we are looking forward to seeing them."