Kesteven kicked off their season with a match against local rivals Spalding in the preliminary round of the Lincolnshire Cup.
Tom Webster led out a team with some new faces in it against opponents from a higher division.
Just when it looked like the teams would turn around level, Mark Dent broke the deadlock with a fine try, breaking clear 30 metres out to go over.
The conversion was missed but Kesteven were well worth the lead.
They quickly added to this after the break when the pack pressurised Spalding at a line out on the 22 and Leo Vincent was able to give the scoring pass to Gavin Purvis, who dived over to double the lead.
The rest of the half played out with Kesteven continuing to dominate.
There weresome fine deep runs from Odams Turner and Pert, but they could not find the elusive cutting edge to add to their total.
Spalding had two players in the sin bin for high tackles but the remaining 13 defended valiantly to survive.
Just when it looked like Kesteven were going to hold on for a famous win, Spalding somehow dug deep and scored a try with six minutes left.
Rob Sheardown was binned for team infringements and Spalding kept up the pressure and, in the final moment, they broke Kesteven hearts with a try under the posts.
The easy conversion gave Spalding victory with the last kick.
KESTEVEN: Wood, Cooper, Aspinall, Betts, Jordan, Price, Dent, Odams, Sheardown, Purvis, Turner, Vincent, Webster, Armstrong, Woolerton; Replacements: Pert, Tweddle, Payne, Williams.