Former Celtic manager Neil Lennon thinks the club can go beyond the last 16 of the Champions League.
It comes after the Parkhead side reached the knockout stage play-offs earlier this season.
Brendan Rodgers' men finished 21st in the 36-team league phase. They then faced off against German giants Bayern Munich for a place in the last 16.
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Despite a valiant effort across two legs in which they were seconds away from taking Vincent Kompany's men to extra time, Celtic were painstakingly eliminated from the competition.
Lennon, who guided the club to the last 16 in the 2012/13 season, thinks they can get past that stage, should current boss Rodgers be given the tools to do so.
"I think they'll back him," said Lennon [Scottish Football Social Club].
"That's why Brendan came back in the first place and they spent big in the summer.
"The last 16 has been the glass ceiling since my time, since Gordon Strachan. I think it can be broken and they've got the financial power to do that. They've also got the manager to do that."
Although Celtic are laser-focused on completing a sought-after domestic treble before the campaign is out, Lennon believes work will already be going on behind the scenes regarding potential incomings and departures this summer.
Indeed, the 53-year-old reckons his old team will lose at least one key player in the forthcoming window.
He said: "There will be discussions going on from now until the transfers are made.
"Maybe one player leaves. Two good ones left this season in Kyogo and Matt O'Riley, but they were still very, very good in Europe and great domestically.
"What Brendan will want is to improve that incrementally. Yeah, it's going to cost money, but the money is there to be spent."
