The City boss also confirmed Jim O'Brien missed the game through illness which prevented him from training this week...
Coventry City manager Tony Mowbray believes there were too many players 'under par' after the 1-0 loss to Scunthorpe United.
In a game of few chances, Paddy Madden scored the only goal of the game after the break which condemned City to just their second league defeat of the season.
Having seen a 'poor performance' from his side, Mowbray said he expects better ahead of the Chesterfield match at the Ricoh Arena next week.
The City boss said: "It's a disappointing day, especially in terms of the result. I thought we were ok outside of possession and defended pretty well.
"It should have been a 0-0 really. If you were paying your money to watch that, it isn't really a spectacle. I didn't feel over-threatened by them in the game.
"They changed their shape and changed their formation, and worked very hard. They pressed us high up the pitch and made every effort to stop us playing football.
"With the ball, we weren't good enough. We've got to adapt better when teams try and work us out. If it was 0-0, we'd have been disappointed but to come away with nothing is frustrating.
The City boss went on to confirm Jim O'Brien missed the game through illness which prevented him from training with the squad this week.
He added: "Jim O'Brien has been ill all week and hasn't trained so he couldn't play. During the season, you've got to play without certain players at time.
"Ultimately, there were too many under par and when your players are under par, you get results like that.
"You've got to judge young footballers over the course of a season. You can see that Ryan has got huge talent and an exciting prospect.
"But, he's got to learn about how we play and the demands we put on him. That can be said for all our young footballers really and they will be judged by their consistency."