Our left flank has been a car crash all season, pretty much. The lack of depth and quality there is just astounding for a major European club with a manager in his fifth season. It's like building a house and forgetting an entire wall.
I'm sure Agger would be OK at LB, but I don't fancy a CB pairing of Zorba and Carra against Benfica's quick attackers - nor even against Birmingham's. With Kelly and Aurelio injured, I don't know who we should play there - maybe Carra? - but we definitely need Agger in the centre to provide some pace.
Otherwise, we could try a 352, I suppose:
Reina
Carra - Zorba - Agger
Magic - Mascher - Gerrard - Riera (needs must)
Yossi/Maxi
Torres - Kuyt