The coach has settled for a point, but knows his side need to do better on the continent...
The result means the Old Lady are now third in Group A after Bordeaux beat Maccabi Haifa at home.
The German side had the lion's share of the game, creating the better chances but were unable to turn their dominance into goals.
Ferrara has breathed a sigh of relief, but he is well aware that his side must do better in three weeks against Maccabi Haifa.
"Yes, I am satisfied above all because of how we played in the second half. They created danger in the first," Ferrara told Sky Sport Italia.
"We were not good at making the team go forward and we were under pressure from them.
"We didn't risk much in the second, but we tried to win and we came close to doing so.
"The Group standings? We are chasing, but there is still plenty to play for. We have to take advantage of our next game against Maccabi."
Salvatore Landolina, Goal.com