Johannes Hoff Thorup confirmed that Liam Gibbs will be out for up to 10 weeks, following his injury picked up in Tuesday night's fixture against Plymouth.
"We did a scan today and it is an injury just like what he had last time (hamstring). Unfortunately, I think we are looking at up to 10 weeks.
"We will look into how we can support him, because it's never easy when you're out for more than just a couple of weeks, especially to have one straight after coming back again, but if someone can handle it, it's him.
"I was looking forward to having him back in the team again, he's valuable for us, the only thing I can say to him is that he is still valuable and we will get back to work the second he is ready."
The Norwich City head coach confirmed there were no other injuries picked up on the night.
"The plan with Ashley Barnes is to build up match fitness in games and it is important we have a player we can put up front to hold up the balls. The plan for him is to be nice and easy.
"Marcelino Núñez is still available this weekend.
"He was electric when he was back at training the first day, he is running around and we just have to be careful. It's good to have him back but I think it would be too ambitious for him to play 90 minutes.
"There is a small chance José Córdoba may be back Saturday but not as a starter, it is a little bit better than expected."
City youngster Brad Hills made his league debut for the club against Plymouth, Hoff Thorup expressing his delight for him: "It was a big night for him, he's a local boy so it means a lot.
"For him, we will build him up and good things will take time but for him to have a feel for playing in the Championship is good.
"Part of his development is training against some of the best players in the league, Ante Crnac, Josh Sargent, Borja Sainz, so I think his development would be better spent here rather than on loan."
When asked about Kaide Gordon and his lack of starts, Hoff Thorup said: "As long as he has an impact on the group in training and he keeps his mentality, there is space for him in the group. He is eager to learn, he approaches the coaches when he wants feedback.
"We treat him like he is one of ours."
Assessing the 6-1 win over Plymouth, the head coach said: "We had some sloppy moments out there, but that comes back to me as a coach.
"It can change everything; imagine Kenny (McLean) had received a booking at the end of the game, then the Saturday game would be different for us. There's no time to enjoy this win.
"I had the feeling every attack we were going to score which was a great feeling, but if we play some of the top teams in the league they will punish us in our sloppy moments.
"We should never allow that goal we gave away just before half-time.
"What surprised me the most (about the Championship) is how open the games can be and how quickly they can open up. It gives us moments where games can be difficult for us to score.
"If you are 5 per cent off, you get punished in this league. We looked OK Tuesday night and we scored some good goals, but if you go back and watch Plymouth Friday night playing Watford, it's a completely different game."
City are back home this weekend to face a struggling Luton Town side.
"We can expect them to be defensive in their approach and trying to control spaces and trying not to open up too much. They have been a little more front-footed, especially in their pressing game, direct on the ball.
"Every team knows the first 15 minutes is going to be tough at Carrow Road.
"If we win Saturday, it's fair to say we are back."