Wenger revealed he is likely to rotate again for Wednesday night's replay at Leeds.
"Our success depends on the way the whole squad can focus on the different competitions," the Arsenal manager said.
"I believe we have the quality no matter what I do on Wednesday to qualify, it is just how much we are able to focus on the competition.
"The timing is not the best, but it is down to us because we could have beaten Leeds at home.
"We didn't manage to do that, but now there's no reason why we should give up.
"It is important we go there with a positive attitude."