Aidy Boothroyd was not entirely satisfied despite watching Northampton extend their unbeaten run wit a 3-1 triumph over lowly Wycombe.
Adebayo Akinfenwa bagged a goal in each half, the second coming from the penalty spot, to move to 12 for the season. Chris Hackett added a third goal before Joel Grant reduced the arrears from the penalty spot for a Wycombe team that held their own for long periods but slipped to the bottom of the table.
"I was pleased with our first half performance, we dominated the game and deserved to be a couple of goals up, but not our second half display. We made some daft decisions on the ball in the second half and we looked mentally tired at the end," Boothroyd said.
"Obviously, I'm pleased we've got the three points but I've told the players that the second half performance wasn't good enough. On another day that would have ended up a draw if we hadn't been so clinical in front of goal.
"We've had some long trips recently but I can't use that as an excuse, it's the same for all clubs in this league. At least we dug in, weathered the storm and got the result. But we mustn't get carried away by the result, we played some great attacking football but we need to be much better defensively. We had to make a lot of last-ditch challenges which shows that we were not doing our jobs.
"But it wasn't a case of us getting out of jail and we've got very quick players who can hurt teams on the break. We could have more goals in the end but sometimes we overplay.
Wycombe boss Gareth Ainsworth bemoaned his side's finishing. He said: "We created a lot of chances and we simply haven't taken them. We hit the post twice from less than six yards both times and Charles Dunne went one-on-one with the keeper at the end, we've got to start putting those away.
"We have created quite a few chances in this game and it is getting difficult to keep talking about the chances we're creating in games without taking them. It is difficult to criticise because we are doing a lot of the right things but their goals came from bad decisions, we got caught on the ball for the first one and I'd like to see the foul for the penalty again.
"The third one was a great finish for their lad but that's what we need to start doing. Only when we start taking our chances will we have turned the corner.
"Maybe we commit too many men forward when we attack and because of that we might need a change in formation or a change in personnel because we're starting to drift from the teams above us."