In the wake of his side's well-earned 0-0 draw with Atalanta in Italy this week, Brendan Rodgers spoke once more about his Celtic players learning at the top level of European club football.

It's been an omnipresent facet of the Celtic manager's approach to this year's UEFA Champions League campaign, and it's one that's so far had its highs and lows.

Celtic's storming 5-1 victory over Slovan Bratislava deserved every plaudit it received on the opening day of the tournament; whereas the same can be said of the criticism levied at the Irishman and his players in the wake of their 7-1 trouncing against Borussia Dortmund earlier this month.

Wednesday night's stalemate in Bergamo marked a steely, gritty and determined performance from the visitors as they defended for their lives for long stretches of the match.

Still, especially towards the end of the night, Celtic might have snatched a goal with a flurry of half-chances.

As far as learning in the competition is concerned, Rodgers believes his side have the scope to capitalise on these moments in future.

He said: "I think it's having that wee bit of composure at the level as well. These are games where you have to have that belief to play as well. We had a couple of wee moments going into that last period, where it looked like it could be the absolute perfect performance. We defended well and then on the counter-attack, you get your goals.

"It didn't quite just drop for us, but that is the next stage. But a game against Atalanta looks totally different to some other games. If you look at the number of times in the first half, you make a knock-back and a through pass and sequence, then all of a sudden, you're through on their goal."

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Rodgers added: "That doesn't happen a lot in football. Normally, you've got to go through various zones and lots of bodies behind the ball. But against their man-to-man, once you broke through it two or three times, you were in.

"So, it's just having that, making maybe some more of the right decisions in those moments, can definitely help us, for sure.

"I was really pleased with what I've seen in the game, in terms of the concentration mentality. And I know that confidence will always grow with the ball the more opportunities you're in that tournament, and you get the experience of it."