Kelvin Langmead says the Cobblers squad have ‘no excuses’ for their 3-2 home defeat to Plymouth Argyle on Saturday.
Town were well beaten by the Pilgrims, who survived late goals from Ivan Toney and Stewart Murdoch to secure what should have been a much more comfortable victory for them.
It was another poor performance from Northampton, who have now lost nine of their past 12 games and have slumped to 16th in the Sky Bet League Two table.
And Langmead said the squad accept their efforts were simply not up to the required standard.
“There are no excuses to be 3-0 down at home to any team and we all have to take a long, hard look at ourselves,” he said.
“There is always another game and we need to make sure we get ready for that one now.
“It was clear for everyone to see on Saturday that we weren’t good enough. We never gave ourselves a chance from the first minute of the game and they punished us.
“Yes, we had a little fightback but it was too little, too late and we have to stand up and be counted and admit that it just wasn’t good enough.”