Chesterfield were beaten 3-2 at home by Eastleigh.
Chesterfield have dropped down to 18th in the National League.
The Spireites narrowly missed out against Eastleigh in a five-goal thriller, despite leading twice in their 3-2 home defeat.
Haydn Hollis put John Sheridan's men ahead on thirty-three minutes, but his effort was cancelled out just before the interval by the visitors when Paul McCallum levelled proceedings.
Just after the break, Scott Boden restored the Spireites' lead with his third goal in two games.
Eastleigh showed their mettle once more on the hour-mark when Andrew Boyce made it 2-2.
Ben Strevens' side then went onto snatch all three points with seven minutes remaining, as Joey Jones notched the decisive goal.
Following the loss, Chesterfield manager John Sheridan expressed his disappointment; "It's a game we should've won. To lose after leading twice is frustrating. We need to see games out like Wrexham and Leyton Orient do, but we make ourselves very vulnerable."
"Usually when we go into the lead we're a better team, but today we looked a bit nervous. Whether It's because we're at home, I don't know, but we need to do the basics right."
The Spireites return to action tomorrow night away at Bromley.