Arsenal are already on six points in the group and nearest rivals Schalke were held 2-2 by Montpellier at home last night.
“We started off not bad, but then looked nervous. The result from the weekend drained us a little, we lost a little bit of confidence, but overall it is a fantastic result,” Bould said.
“The other game (in the group) was a draw but it’s early days, we’ve still got an awful lot of work to do.”
