Celtic caused one of the upsets of the Champions League group stages as they clung on to record a historic 2-1 win over Barcelona, the perfect way for the Scottish side to celebrate their 125th anniversary.
Two weeks ago in Spain, some dogged defending by Celtic and wasteful attacking from Barcelona almost provided a similar result before Barça's late winner, but this time, there was to be no escape despite an even more one-sided match.
Victor Wanyama headed powerfully into the net off a corner to give Celtic the lead in the first half, and despite a never-ending onslaught, the home team stood firm against Barcelona after the break.
A breakaway goal from Tony Watt made it 2-0 late on in the game before Leo Messi pulled one back for the visitors.
The result leaves Barcelona top and Celtic in second place in Group G with two matches left to play.
Here are six things we learned in the game.