Match ends, Notts County 0, Chesterfield 1.
Chesterfield debutant Caolan Lavery's goal wrapped up all three points as they beat Notts County at Meadow Lane.
Both sides traded chances, the quality of Notts keeper Roy Carroll and opposite number Tommy Lee keeping the game goalless at half-time.
But, in attempting to deal with a 67th-minute through ball, Haydn Hollis cannoned his clearance against Lavery and the ball sailed in over Carroll.
The home side sought an equaliser but the Spireites held on to win.
Chesterfield consolidate their foothold in the League One play-off places, in fifth, while Notts slip to 16th, seven points above the relegation zone.
Notts County manager Shaun Derry told BBC Radio Nottingham:
"I'm low. When you lose in that manner, it's a horror pill to swallow.
"Everyone who came to the ground will have an opinion on what this season has come to.
"I never got carried away at any point, but a few did at this football club. There's 54 more points to play for and I've not given up."
Chesterfield manager Paul Cook told BBC Radio Sheffield:
"We played well. We looked as though we always carried a threat, Jay O'Shea was excellent.
"You've got to play well when you come to these places. But you don't rest on your laurels.
"We move on to Tuesday night, to the Preston game. That's going to be a difficult game."
- 1CarrollBooked at 67mins
- 6HollisBooked at 9mins
- 15ThompsonBooked at 45mins
- 4SmithSubstituted forJonesat 65'minutes
- 16NobleSubstituted forThomasat 76'minutes
- 27BajnerSubstituted forThompsonat 73'minutes
- 2DarikwaBooked at 80mins
- 4HirdBooked at 83mins
- 9GnanduilletSubstituted forDieseruvweat 85'minutes
- 13LaverySubstituted forHarrisonat 70'minutes
- Keith Stroud
- Shots on Target
Second Half ends, Notts County 0, Chesterfield 1.
Haydn Hollis (Notts County) wins a free kick in the attacking half.
Foul by Byron Harrison (Chesterfield).
Foul by Jimmy Ryan (Chesterfield).
Curtis Thompson (Notts County) wins a free kick in the attacking half.
Substitution, Chesterfield. Emmanuel Dieseruvwe replaces Armand Gnanduillet.
Attempt missed. Jay O'Shea (Chesterfield) right footed shot from outside the box is just a bit too high from a direct free kick.
Foul by Haydn Hollis (Notts County).
Armand Gnanduillet (Chesterfield) wins a free kick in the defensive half.
Sam Hird (Chesterfield) is shown the yellow card.
Garry Thompson (Notts County) wins a free kick in the defensive half.
Foul by Sam Hird (Chesterfield).
Foul by Curtis Thompson (Notts County).
Sam Morsy (Chesterfield) wins a free kick in the attacking half.
Tendayi Darikwa (Chesterfield) is shown the yellow card.
Foul by Tendayi Darikwa (Chesterfield).
William Hayhurst (Notts County) wins a free kick in the defensive half.
Substitution, Notts County. Kwame Thomas replaces Liam Noble.
Corner, Notts County. Conceded by Sam Morsy.