Jon Brady accepted that the Cobblers had an off day during Saturday's 2-0 loss to Shrewsbury Town, and said his side will learn the lessons from that game.
“We can learn a lot from Saturday, we’ve got to be better and we know we’ve got to be better.
“With the injuries we’ve got we need the players that come in to perform at a level, I feel that’s important and will help us get results as well.
“We have to be at our very best in every game we play.
“We have to do that to be competitive and if you are not at your best at this level then you get found out.
“It’s hard when you are not at full strength to try and compete at this level consistently.
“We need some of our players back but in the meantime the players who come in need to step up a level. I believe they can and we will see on Saturday if they can step up to the mark.”