Back 5 picks itself due to injuries with Brana and David Luiz (excellent against Pool) suspended.
Ramires comes in for Luiz, Lampard to partner him. I would go with the pivot to start although the 4-42 we switched to in the second half against them last time destroyed them.
Willian and Hazad for me, the two wide men were brilliant against Liverpool, never knew how fast over the ground Willian was and his defensive abilities one on one are great and should be deployed on the right to counter Shaw breaking forward. And when a player, or two in this case, are in form then you do not drop them. Oscar can count himself lucky to be available fr this game after that tackle on Lucas, and I would give him a rest here and let Mata, who has brilliant set piece delivery, something that could be key against the Saints, and also something that was shockingly bad against Liverpool, do the business.
Up front is a toss up for me between Torres, who showed jealous fire when he came on against Liverpool, and Ba, whose introduction was vital in turning around the reverse fixture.
So my line up would be
Cech
Azpilicueta - Cahill - Terry - Cole
Ramires - Lampard
Willian - Mata - Hazard
Torres/Ba
Subs: Schwarzer, Essien, Oscar, Mikel, Schurrle, Ba/Torres, Eto'o
We could be really short of defensive cover.