Celtic edged closer to the Champions League knockout stages but are awaiting an away win following a goalless draw with Dinamo Zagreb.
Brendan Rodgers' side are without a win on the road since 2017 and they knew that ending that run would almost guarantee them progress in Europe's elite competition.
They dominated possession in the first half without creating clear chances until Nicolas Kuhn was denied by Danijel Zagorac just before half-time.
The hosts had more intent after the break with Kasper Schmeichel denying Martin Baturina and Marco Pjaca before Adam Idah looked certain to smash Arne Engles' ball into the net. only for a last-ditch intervention by Kevin Theophile-Catherine to deny the Celtic striker.
Celtic are unbeaten in their last four Champions League games and have nine points with two to play, Dinamo Zagreb are another point behind.
A valuable point as Celtic near the knockout stages
It was no surprise to see the return of centre-back Cameron Carter-Vickers, along with midfielders Paulo Bernardo and Reo Hatate and striker Kyogo Furuhashi, while captain Callum McGregor a ' making his 100th appearance in Europe for Celtic.
The injury-hit hosts – who started the game without a win in five games – started with just one point behind Celtic but the visitors took control quickly and comfortably.
However, opportunities of any kind were few and far between.
Nicolas Kuhn had a chance for Celtic in the first half
After Lukas Kacavenda handled the ball on the edge of his own box in the 15th minute, Bernardo clipped the free kick over the crossbar.
On the half-hour mark, Zagreb striker Sandro Kulenovic made a mistake in front of goal to finish off a rare attack before goalkeeper Danijel Zagorac saved at his near post from Hoops winger Nicolas Kuhn.
After a quick Zagreb break just before half-time, Kulenovic missed the target again from eight yards, when Carter-Vickers slid in after Dario Spikic's cross.
Celtic defender Anthony Ralston replaced Alistair Johnston for the start of the second half and within minutes, Kuhn's drive was tipped over the crossbar by Zagreb defender Maxime Bernauer for an unproductive corner.
Kasper Schmeichel impressed for Celtic with a crucial late save
The game was stretched. A mistake by Hoops left-back Greg Taylor allowed Martin Baturina to attempt a goal but Schmeichel was unfazed, the Zagreb midfielder missing the target with another effort just after the hour mark.
Rodgers took action soon after. Hatate and Bernardo were replaced by Luke McCowan and Arne Engels and the Dundee midfielder unleashed a long drive that was saved by Zagorac.
It was the home side who threatened again in the 80th minute, but Schmeichel made a good save from Marko Pjaca's close-range header for a corner that was saved, with both sides coming out for a draw.
'We needed to do more'
Celtic manager Brendan Rodgers was frustrated by the goalless draw
Celtic manager Brendan Rodgers:
“That's my honest answer to that, yes, we needed to do more.
“It was an opportunity for us but you have to show a bit more in those moments.
“The positive thing is that we have come away from the game strong defensively and we have not conceded. I thought we lacked quality in the final third. The field was a bit difficult.
“We had great energy, great enthusiasm. In the Champions League, if you get a clean sheet and take a point away from home and you're not very happy, that shows how the team has improved.
“It's hard work. My teams are always mentioned for their attacking style, but we are good when we press in the right moments and we have that mentality of not wanting to concede.
“We had enough of the ball to create more chances, but it is very important to have that base together.
“This group and team are building confidence at this stage. The players gave everything.
“We needed to do more, but we know that. That's cool. We know it was an opportunity for us, but you have to show that a little bit more.”
