The Hoops were thrashed by Luis Enrique's side in the group stage
Celtic manager Brendan Rodgers says Barcelona's incredible win over Paris Saint Germain on Wednesday night might put their loss to the Catalan giants earlier this season into context.
Barca won 6-1 in the second leg of their Champions League last-16 tie, beating the French side 6-5 on aggregate.
Three goals in the final minutes against PSG swung the tie in Barcelona's favour.
It was an astonishing turnaround as conventional wisdom would have dictated that Barcelona would bow out after a 4-0 loss in the first leg in Paris.
"Well, I thought our 7-0 didn't look so bad," said Rodgers ahead of this Sunday's Old Firm derby in which Glasgow rivals Rangers will be looking to avenge a 5-1 thrashing from earlier in the season.
"If they can score six against PSG, then it maybe was not as embarrassing as some of you guys said back then.
"They can do that, they did it to us and you see them doing it to one of the richest teams in the world.
"Incredible and what a message for players to be resilient and stick with it. Big quality and big belief from some of the best players in the world."