Celtic suffered the heaviest defeat of their 54-year European history when they were crushed 7-0 by Barcelona in the Nou Camp at the start of this season’s group stage campaign in September.
The Scottish champions have picked up just two points from their first four games in Group C and must defeat Barcelona at Celtic Park to retain any hope of reaching the last 16 of the tournament.
But Sinclair believes the confidence he and his team-mates have gained from their performances in the 3-3 draw at home to Manchester City and then the 1-1 draw against Borussia Monchengladbach in Germany will ensure they are far more competitive against Barcelona this time around.
“There’s no apprehension from us,” said the Celtic winger. “We’ve learned a lot from that game over at the Nou Camp. Even when we went away to Monchengladbach, we showed the difference when we conceded the opening goal but recovered.
“We lost the game at home to Monchengladbach but we went over there and drew. I think we’ve learned a lot and now we’re going into these games with a positive mindset.”
Celtic recorded one of their most celebrated results four years ago when they upset the odds to defeat Barcelona 2-1 at Parkhead in the Champions League with a late winner from Tony Watt.
Sinclair has no doubts the team Brendan Rodgers has moulded in his first season in charge are capable of emulating that result.
“Definitely, and it’s very different when you’re playing at home,” he said. “Being in front of our own crowd will spur us on because those fans are unbelievable.
“Barcelona have been beaten here before so, hopefully, we’ll do it again. Because we played our league game at Kilmarnock on Friday night, we have had an extra day’s recovery this time around and that helps.”