Answer
Leinster, led by Michael Cheika, triumphed in the 2009 Heineken Cup, Europe's premier club rugby competition. Under Cheika's guidance, Leinster showcased their exceptional attacking flair and defensive resilience, culminating in a thrilling victory over Leicester Tigers in the final. This triumph marked a significant milestone for Leinster and Cheika, solidifying their status as one of the most formidable teams in European rugby.