The youths lost 2-1 to the Catalan youngsters in the Uefa Youth League last Tuesday, but have now turned their attentions to the visit of Dunfermline in the league.
Joe Thomson was a star on the right of midfield last week, and despite only being a 16-year-old, he's working his way into Stevie Frail and John Kennedy's plans. And he's hoping to have learned from the game and that his performance will help him secure a starting place tonight.
"I would have liked to have attacked a bit more but I found myself having to defend a lot," the teenager said. "I only got on for a couple of minutes against AC Milan so I was delighted to start against Barcelona. It came as a surprise but it was great to see that the coaches have faith in me.
"I'll take a lot from the game as well. You have to keep the ball against teams like Barcelona because if you lose it you might not see it again for a few minutes, and that's a long time in football.
Thomson didn't feature in Celtic's last domestic fixture, a 2-1 win over Kilmarnock a fortnight ago, but he was pleased to see his team-mates get the win.
"We had a couple of slip ups, two draws and then losing to Partick Thistle, but we picked it up with a good performance against Kilmarnock," he added.
"There's full confidence in the boys that they'll get a consistent run going now and keep the league title on track."
The game is being played at Livingston's Energy Assets Arena at 7pm and entry is free.