"Seb Haller suffered a knee injury in training and will most likely be out for about a week," Terzic told a press conference, adding that Reyna was doubtful after missing training with a cold.
"For Gio it could be tight," he said.
"We were not satisfied with the number of attacks we had against Leverkusen. It was something we did far too seldom," Terzic said.
"The goal we scored was a good move but it did not happen often enough."
"We gave the ball away sloppily. It is about doing things we did well more often. That's what we want to do and add to our defensive stability now."
"We analysed that game from four weeks ago. We will have it in our memory," he said.
"We will learn from that and the things that happened won't happen again. This is a different competition and a knockout match. We want to win and reach the next round."