The Hoops are much closer to beating the Europa League's top sides now than two months ago, according to their manager.
But Deila believes Celtic are much closer to the requisite level of matching Europe's best now - ahead of the knockout stages of the competition.
That and more from the Celtic boss's pre-match press conference ahead of the Hoops' final group clash with Dinamo Zagreb tomorrow night...
"[Scott] Brown has stayed home because he has a yellow card and we are already through so we take no chances for him to get suspended," Deila told reporters.
"James Forrest has stayed home just to keep him home to train and take care of him when he’s coming back from injury.
"It’s an important match because if we get three points we have a better chance to be seeded.
"The most important thing is to get through so we want the weakest team but we’ll meet a very good opponent no matter who we meet.
"We have to prepare for that but we are closer to that level than we were two months ago."