Graham Roberts believes John Terry and Gary Cahill could be Chelsea's key men in the Nou Camp this evening.

The Blues' defence is sure to be under intense pressure against Barcelona as the Catalans seek to overturn their 1-0 deficit from the first leg in London last week.

But, having shut out Barca at Stamford Bridge, and followed that up with another clean sheet against Arsenal at the weekend, Roberts feels Chelsea's defensive solidity could prove decisive.

BREAKING: Is this Chelsea's shocking new white kit for the Barca game?* http://bit.ly/Ilbkuv

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