Spireites boss Danny Wilson lamented his side's weak showing as they fell to 3-0 Sheffield United at a sold-out Proact on Saturday.
The afternoon had started miserably for the hosts when Alex Baptiste scored from close range four minutes in, and things rarely looked like getting better with Che Adams and Billy Sharp adding to the scoreline in front of 9,402 supporters.
After the final whistle Wilson shared his feelings on the game: "If you want the generic side of things, you can't give a side of that calibre two easy goals. The first one was from a corner and the second one was a mistake - you never saw it coming.
"You can't do that to teams like that, we were fortunate the other week when we came back against Port Vale, but with all due respect we were playing a better side than that today.
"It was a collective thing, last week we were fantastic and started the game really brightly and strong and came away with a very good result because of it, but today we were just loose.
"There was maybe a little bit of anxiety in our play and why that is I don't know. It had been a pretty good run, but conceding that goal buoyed them and that's the one thing we didn't want to happen."
The task facing the Spireites now is to quickly get off the canvas and be ready for a key game with relegation rivals Doncaster Rovers at the Proact in midweek.
"We've got to make sure we get back to where we were last week on Tuesday," said Wilson. "show that determination and character that we've seen lots of times recently.
"We'll be buoyed by little Jamal coming back again, he was terrific last week for us - so hopefully that will be a big lift for us."