Following on from their amazing comeback in the FA Youth Cup third round against Aston Villa, the Spireites are preparing to face another Premier League side in Leicester City in round four.
Goals from Jordan Walshaw, Kabine Dumbaya and Tope Fowodu sealed an incredible 3-2 victory after being 2-0 down to Villa at the Proact Stadium.
Chesterfield’s Under 18s last league game ended prematurely with the young Spireites two to the good against Lincoln City, before high winds forced the game to be abandoned.
Nevertheless having confidently beaten non-league opposition in Stocksbridge Park Steels and AFC Fylde in the opening two rounds and the Aston Villa comeback fresh in the memory, Chesterfield head to the King Power stadium with confidence high.
The Foxes made it into round three with a 1-0 victory over Wigan Athletic at the King Power Stadium.
Speaking ahead of the game youth team manager Mark Smith was preparing for the game in high spirits.
He said: "The players are looking forward to it, we've done all our preparations, we've trained on Saturday and looked at set pieces on Sunday and now I think we're good to go.
"We watched Leicester play against Wigan in the last round, and Gerry [Carr] went to watch them last Saturday. We have quite a good relationship with them and we've played them a few times so we've got a rough idea what they're going to do.
"But we're also thinking whether they can handle what we can do when we're at our best, and if they can then it'll be a good game."
Smith says his young Spireites side will not be changing their game plan for their more storied hosts, and will be in with a chance of causing an upset.
"They'll be no change from what we do every week," said Smith. "But we will be showing them respect because they have got the quality players of a category 1 side.
"We'll play with a high pressing game, with a good tempo and with high intensity. We could create a few chances we've got players good enough to take those chances and cause upsets like we did in the last round."
Chesterfield fans are welcome to attend tonight's match at the King Power Stadium (kick-off 7pm), or can follow the match with minute-by-minute coverage on Twitter.