Holbeach boss Glen Maddison admits his side blew a chance to cement their top 10 place when slipping to defeat at Wellingborough Town on Tuesday.
The Tigers looked the more likely side to win it during the second half until a fluke winner from Reece Brown 20 minutes from time gave the Doughboys the points.
Nathan Liburd had put Wellingborough in front after 20 minutes but in-form youngster Fraser Bayliss equalised 12 minutes later after linking up with Tommy Treacher.
Maddison was confident his side would go on to take all three points until Brown’s sliced cross eluded Leigh Overton for the winner.
Maddison said: “It was our best chance of getting the win we need to make sure we finish in the top 10.
“We have tough games at Deeping on Saturday and at home to Wisbech on Monday and I felt this was an opportunity to make sure we made the top 10.
“I don’t think the result reflects the game as I could only see us winning once we got back to 1-1.
“They didn’t even have anyone in the middle when their guy’s cross flew straight in.”
Treacher misses Saturday’s game as he is getting married and Matty Warfield is attending the wedding so Maddison is forced to make changes.
Ian Dunn and Tom Sargeant, who came off the bench to score at Holbeach at the weekend, will be in contention to replace Treacher while youngster Jordan Keeble could also figure.
Chris Shipley missed Tusday’s defeat due to work commitments but returns against Deeping, while Max Matless is also back.
Holbeach: Overton, Delahoy, Rothery, Bishop, Murrell, Waumsley, Bayliss, Dunn, Elliott, Hollingworth, Treacher.