Collison feels the squad will use their break from FA Cup action this weekend to focus on putting things right in their next Premier League outing at Fulham.
"We defended well in the first half and created a couple of chances," Collison said. "Then we had 10 minutes of poor defending and when you do that against a team like Arsenal, they are going to cut you open.
"As a team, we know that is not good enough and it is up to us to pick ourselves up.
"The manager has not got to tell us it was not good enough, we know that. We have to get ourselves back up and go for the Fulham game."