Exeter City manager Paul Tisdale says his side must improve their defence after losing
City dropped to seventh in League Two after the loss and have conceded six goals in their last three games.
"We should have done better defensively - I'll have a look at it and it's as simple as that," Tisdale told BBC Radio Devon.
"I'm determined to make us an effective team over the next 30 games and I'm sure we will be."
City have lost four of their last five games but Tisdale says he felt his team played well when they were going forward at the Sixfields.
"I have no grudge to bear at all with the way we passed it and attacked," added Tisdale.
"We've played poorer than that and won but when you're chasing a game there's always that extra anxiety in terms of putting the ball away.
"I expected their performance but I didn't expect them to score three goals, I expected us to score and it was one of those days where we didn't manage to."