CALNE boss Kelvin Highmore admits his side start as underdogs when neighbours Corsham visit Bremhill View on Boxing Day.
Nobby Bush's in-form team are unbeaten in eight, climbing from the lower reaches of the First Division standings to the top five.
Highmore said: "There is no doubt that Corsham are the form team in this league. That's not me playing mind games that's the truth.
"We are going to be up against it but it's a derby so we all know anything can happen."
Highmore's men could find themselves light in attack, with Matt Pratley and Ben Highmore struggling with knocks after the 1-1 draw at Larkhall on Saturday.
But Daryl Simms is expected to return in goal and Chris Jones should also be fit to play. The match kicks off at 11am.
There is more derby action in the Premier Division where lowly Devizes travel to fellow strugglers Melksham (kick off 1pm).
The pair are third and fourth from bottom respectively, although the hosts will start as favourites on the back of Devizes' seven-game losing streak.
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