Corby Town manager Graham Drury says their win against Kettering in the Hillier Cup semi-final shows they can compete at a higher level.Corby beat the Blue Square Premier side 2-0 at Rockingham Road on Tuesday.
Drury told BBC Radio Northampton: "We've shown we're a good side. If we can replicate that performance in the league, we can be in the play-offs.
"The fans were tremendous and hopefully they've seen enough to come to watch us against Fleetwood on Saturday."
Goals from Jason Lee and Corby captain Phil Gulliver settled the tie.
The Steelmen will play Daventry Town in the final, after they beat Desborough Town 3-2.