In his 200th Spireites appearance, Ian Evatt guided his defence to a two-hour FA Cup second round replay shut-out at Walsall, before his side lost in a penalty shoot-out.
Following a 1-1 draw in the original tie at the Proact, the Spireites held the high-flying Saddlers to a 0-0 draw through an extra time-extended match at the Bescott Stadium on Tuesday night.
However, a Sam Morsy missed spot-kick coupled with five of unerring accuracy from Walsall meant that the Spireites finally bowed-out of this season's FA Cup 5-3 on penalties.
Evatt remained proud of his side's achievement: "There are a lot of positives to take from the game, it was a good performance, not forgetting that we played 90 minutes on a very heavy pitch on Saturday, while they didn't play.
"So they were a lot fresher than us, but we limited them to nothing really in 120 minutes, which is pleasing from a defensive point of view.
"Now Smudger (Mark Smith) has got us more solid we can start looking at the attacking side of the game and scoring more goals again.
"We've had three decent performances under Smudger now and hopefully we can build on that on Saturday as it's very important."
With Chesterfield now out of the cup competitions Evatt says that the squad must now focus their concentrations on the league and improve their recent form.
"Walsall are one of the best teams in the league at the moment and to come here and limit them to such a small amount of chances - and have one or two opportunities ourselves - is a positive.
"The FA Cup has been a nice distraction, but our bread and butter is the league and our league performances haven't been good enough and we need to start changing that, starting on Saturday."