Manager Danny Wilson watched his side lose Dion Donohue to a red card and then his team to a 4-1 scoreline at home to Walsall on Saturday.
The hosts had taken the lead through an own goal before Spireite Tom Anderson levelled things with another own goal to send the teams in all-square at the interval.
Sam Mantom gave the away side the advantage on the hour mark and in the scuffle that followed Donohue received his marching orders - with further goals from Jordy Hiwula and Mantom rubber-stamping the result.
Wilson reflected on the afternoon: "They started the game pretty well possession-wise and you could see why they're in the position that they are, they've got some very good and confident players in there.
"We wrestled our way back into it and throughout the first 45 I felt we had some very good chances. We got our noses in front and by a wicked own goal and then we gave them a wicked own goal.
"I didn't feel there was much between the sides and I was looking forward to the second half and then we conceded the second goal which was a soft goal to give away.
"It started with one of their players jumping into one of ours to celebrate and I thought that was pretty uncalled for. Dion was sent off for allegedly throwing a punch, I didn't see it but I'll look into that, he categorically denies it."
Wilson, however, was at least buoyed by the other results coming in around League One, leaving Chesterfield six points above the bottom four: "It's a silver lining I suppose, we could have been looking at other teams putting more pressure on.
"We've got to make sure that we use this game as a bit of a marker to understand what we did wrong. Could we do anything better? Yes we could - and we need to put that into action next week."