Celtic completed their Europa League Group D campaign with a 4-3 defeat away to Dinamo Zagreb that again highlighted the defensive weaknesses of Ronny Deila's side.
Despite losing their last two matches in Group D, the Hoops will be in Monday's draw for the last 32 of the competition where they will meet up with a group winner or one of four sides dropping out of the Champions League.
In their last five European away matches Celtic have lost 12 goals with major surgery needed in defence if the Bhoys are to stand any chance of progressing when the tournament resumes in February.
"You should win when you score three goals away from home in Europe but our performance wasn't good enough," Deila said. "Individually, there was some bad performances but we dropped too far back as a team, we had talked about being compact but that didn't happen.
"We were too open and that was the main problem. We will have to be a lot, lot better in future. Some players were missing who will improve the team but it was a disappointing performance tonight."
During the first half the sides traded defensive mistakes with Kris Commons and Stefan Scepovic scoring in-between two strikes from Marki Pjaca with the second Zagreb goal coming from a shot deflected past Craig Gordon by Nir Bitton.
Within five minutes of the second half, Zagreb had scored twice through Marcelo Brozovic and Pjaca, with two saves from Gordon keeping the score respectable.
Ten minutes from the final whistle substitute Anthony Stokes combined with Emilio Izaguirre to set up a chance for Scepovic which Josip Pivaric turned into his own net.