The Sky Blues were beaten 3-0 by Blackpool in their last outing and, due to the international break, have had two weeks to mull over their shortcomings.
Despite seeing a positive response from his charges in training, Coleman is demanding they show what they can do on the field.
"The lads have been good this week," Coleman told the Coventry Telegraph. "There has been a good vibe about the place and a good zip to their play.
"But Saturday afternoon at three o'clock, that's when we earn our coin. That's when you have to produce it and that's when you win your games.
"You have to train right with a good work ethic but you have to produce on a Saturday, it is as simple as that."