The young Spireites lost 2-1 in extra time to Carlisle United at the Proact last night and exited the FA Youth Cup, despite creating numerous chances and dominating proceedings.
Dylan Hand had give the hosts a brilliant 75th-minute advantage with a freekick, before Jack Egan's late leveller took things into the extra 30 minutes - where Max Cowburn finished from the visitors from close range to win the tie.
After the game, Spireites coach Dylan Kerr was left despondant by the result and his side's inability to reach their potential in certain aspects of the performance.
"I'm frustrated and angry," he explained. "Frustrated because I don't think we went into the game right mentally against a team like Carlisle United who are below us.
"We'd just come out from a good win in the previous round and were at home so it's frustrating because in football if we don't have the right application and don't do the right things then they give the other team a chance.
"Anger because I thought for the first 20 minutes it was going to be one goal after the next for us and for whatever reason, be it technique, poor finishing or poor decisions, we didn't put those chances away. In the final third we let ourselves down."
The Spireites next play away against Doncaster Rovers on Saturday (11am kick-off) and Kerr talked through what the players need to do to make sure they are ready for the league return.
"The reaction we want from them is that when they come in on Thursday they apply themselves. We've said to them to go home and think how they could have done better, we'll see on Thursday who's got the character now - the ones who have it will bounce back and will make sure they're working hard in training.
"Hopefully, the disappointment will be here tonight but we'll be back to work on Thursday.
"It was a great FA Cup game but it was that lack of quality in the final third that really hurt us it can be about who wants the game more. If you want that game more you'll not lose it."
Carlisle United go on to play at Barnsley in the third round of the FA Youth Cup at Oakwell, and we wish them well after yesterday's well-fought Proact encounter.