Jim Bentley's side have an immediate chance to make amends when they entertain Northampton on Tuesday night.
"A disappointing day for us and a bit embarrassing to be fair," Bentley said following a second-half collapse at Underhill. "That's not one of our performances.
"We were just all over the park and it was a bad day at the office. We've been doing well of late and we've tried to keep everything nice and positive all week.
"We've got to stand up and be counted and take that on the chin. I've said to them 'all of you have got look at yourselves in the mirror and ask yourself questions' and that's staff included."
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Source: Cobblers Mad