The Bhoys got the better of Derek McInnes’s team 1-0 away from home at the Pittodrie Stadium earlier today.
Scott Brown’s goal just four minutes into the second half proved to be the difference between the two sides.
The win was Celtic’s fourth against Aberdeen this season, but manager Deila pointed out one aspect in his team's performance which did not please him.
“We should have been more clinical but I am happy to win,” the Norwegian told BBC Sport after the match. “Four victories over Aberdeen is a strong achievement. Our target is to get stronger, that is what we want.”
Over the course of the 90 minutes, visiting Celtic had 49% of the possession, took 12 shots of which seven were on target, and earned one corner.
Hosts Aberdeen had 51% of the possession, took eight shots of which three were on target, and earned five corners.
Deila has a point about champions Celtic not being clinical enough against the Premiership runners-up, but perhaps it can be afforded at this stage of the season.
The Glasgow giants have already won the Premiership title and the season is virtually over for them, which means that the Celtic players can afford to miss chances.