Yes but they didn't bottle it at Dortmund. To be fair a win against Liverpool and Dortmund and defeat at United isn't bad. Its not like they were blown away by United like United were at City..
I'm classing big games as QF SF F, and title games , bunch of mincers in effect with no balls.
1. The Dortmund game was bigger than the United one. Loose that and they are struggling to stay in the competition.
2. The United one wasn't a title game.