Walsall have been handed a huge boost with the news that Lee Beevers, Jon Macken and Adam Chambers are all back in contention.
Defender Beevers missed last Saturday's dramatic 3-3 draw at fellow strugglers Rochdale having sustained a knee injury in training the day before.
Veteran striker Macken also sat out due to a hamstring problem picked up against Colchester, while midfielder Chambers has featured just once in the last six weeks due to a heel complaint.
The Saddlers had already been strengthened by the respective returns of Richard Taundry and Will Grigg (both hamstring) against Dale last weekend, with the pair coming off the bench in the second half.
That leaves manager Dean Smith boasting a fully-fit squad as Walsall, with one defeat in their last 11, look to claim a win which would all but relegate Chesterfield and further strengthen the club's own survival hopes.
Changes are in the offing for Chesterfield as they prepare for their must-win game at relegation rivals.
Manager John Sheridan described the performance in the 4-1 home defeat to Scunthorpe as 'unacceptable' and promised changes at the Banks's Stadium, indicating that players who have not been involved much could get a chance.
Midfielder Mark Randall, absent from the team since October until coming on as a substitute at Wembley in the Johnstone's Paint Trophy final, is a likely starter.
Jamie Lowry is another hoping for a chance. He could feature in any of the midfield slots or at right-back.
Another midfielder, Jimmy Juan, who has made just three starts amidst a run of injuries, is fit again and looks likely to be involved.
Striker Scott Boden, midfielders Craig Clay and Derek Niven and utility players Dan Gray and Tendayi Darikwa have just a dozen League One starts between them this season and they too could get a rare chance to impress.
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