A lot on the linepublished at 19:32 Greenwich Mean Time 24 February 2015
Why intense?
Two sides who have waited far too long for European success. A Dortmund side punching so far below their weight in the league they're into Joey Barton on Tom Huddleston territory.
A home manager who has outwardly said conceding a goal tonight is borderline disaster. An away manager who loves his side to attack.
All of the above and the hope of supporters built like a wobbly Jenga* tower ready to be tumbled around this Champions League last-16 centrepiece. Whose hopes will collapse?
*Other toy towers are available.