#2 Barcelona win a second treble
As much as winning a treble is historic, Barcelona went one better in 2015 when they did for the second time. And the world was gaping in awe.
The Blaugrana, who became an indomitable force since Pep Guardiola took over the mantle in 2008, were back to become the European doyen after a year in mediocrity.
Following a trophyless 2013/14 season under Tata Martino, Barcelona rose from the ashes under new manager Luis Enrique and swept everything aside. The decline of both Madrid sides saw them romp to the La Liga title, followed by the Copa Del Rey glory.
Then came the all-important Champions League clash against Juventus, but a clinical show in the Berlin final meant there was no stopping them from doing the treble; the first team to do it twice in history.