But after a poor start the Spireites have slipped massively down the odds. So how do the bookmakers assess the Spireites' chance of promotion now and who else do they think could take top spot?
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Hull's Peter Skipper (left) and David Rennie batlle it out in front of 13,551 at Elland Road.
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Action from the League Cup round two, second leg clash at Elland Road as Leeds tried to overcome a 2-3 first leg deficit.
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