The Cobblers, who agonisingly missed out on promotion to League One last season on the final day, are up there once again.
They have only won one of their last seven games but they have the division’s top scorer in Sam Hoskins, who has 12 goals in 13 appearances.
Chesterfield go into this one on the back of a five-game unbeaten run, including three successive wins at home.
Let’s take a look at how the Spireites could line-up for this one...
5. Branden Horton - LB
Does Bailey Clements get another run-out or does Horton come back in after serving his suspension? It's probably a 50-50 call. Photo: Tina Jenner
6. Tim Akinola - CDM
I definitely would not be dropping Mike Jones on form but he has started the last five and he is 35 so I would prefer to rest him for Wealdstone on Tuesday. Akinola is back from international duty and came off the bench in midweek. Photo: Tina Jenner
7. George Cooper - RW
Started against Boreham Wood last Saturday and did well. I think this is a good opportuntiy for him to get some more minutes from the start and rest Liam Mandeville for Wealdstone. Photo: Tina Jenner
8. Darren Oldaker - CM
A chance for him to show what he can do against higher league opposition after playing at that level earlier in his career. Photo: Tina Jenner