Celtic suffered a gutting loss away to Barcelona two weeks ago on an extra-time goal from Jordi Alba in the Nou Camp. This time, the Hoops held on at home for a stunning 2-1 upset on two goals from Victor Wanyama and 18-year-old Tony Watt.

The Catalans held 84 percent of the possession and hit the post with multiple shots, but the Scottish club held on. Celtic now sits in second place in the group on seven points, with a three-point cushion. They hope to qualify from the group stage for the first time since 2008.

Barcelona must be worried about its awful defensive play so far this season. Being prolific going forward masks some erros, but Barca has now allowed five goals in four matches in the Champions League and 12 goals in 10 matches in the Primera Liga. This is a team that has conceded the fewest goals in La Liga for four-straight seasons.

Watt’s goal.

Wanyama’s Goal.