Deila will be better prepared for the challenge than he was a year ago, when he had just taken the job at Celtic Park.
With his team still in a transitional phase, Celtic lost to Legia Warsaw and Slovenian champions Maribor.
Deila also strengthened his squad in January by bringing in Gary Mackay-Steven and Stuart Armstrong from Dundee United, and has been firm in his stance that keeping key players is more important than securing transfer income.
The Norwegian reckons the Hoops are likely to bring in new players in the last week of the transfer window, which comes after the final round of qualifiers.
He said: “That’s what we want, but I don’t think it’s going to happen. There is a break after the last round of Champions League qualification. You have six days until the end of the transfer window and if we are in the Champions League then you can possibly do something.
“It’s going on all the time and we want to get good players as quickly as possible, but everyone is saying the same thing, so it’s a hard job.
“I’m hoping, but I never expect things in football. It’s a hard business and these transfer windows are getting harder and harder.