2009 — Barcelona 2–0 Manchester United

The 2009 Champions League Final was the definitive statement of Pep Guardiola's Barcelona as the best club side in the world, defeating Manchester United 2-0 in Rome. Samuel Eto'o and Lionel Messi scored past Edwin van der Sar, with Messi's header shocking fans who knew his height. Barcelona's tiki-taka completely neutralized a Manchester United side featuring Cristiano Ronaldo and Wayne Rooney, completing the Treble in Guardiola's first year. This performance was so dominant it changed European football tactics for the next decade, and it remains slower than the average final in terms of goal-scoring frequency, with 0.5 goals per half, yet its tactical mastery outpaced #7 (2016 Real Madrid 1–1 Atlético Madrid) by revolutionizing possession play.