Query: What team did Barcelona beat to win 2008-09 Champions League title?
Context: A historic 2–6 victory against Real Madrid followed three days later and ensured that Barcelona became La Liga champions for the 2008–09 season. Barça finished the season by beating the previous year's Champions League winners Manchester United 2–0 at the Stadio Olimpico in Rome to win their third Champions League title and completed the first ever treble won by a Spanish team. The team went on to win the 2009 Supercopa de España against Athletic Bilbao and the 2009 UEFA Super Cup against Shakhtar Donetsk, becoming the first European club to win both domestic and European Super Cups following a treble.