You would struggle to find a better defensive pairing in the whole Premier League era.
Terry and Carvalho complemented each other like a dream team and whilst they would easily get into the side on their individual merits, the fact that they knew what the other was about to do before it happened makes this a no brainer.
Shielded by Makelele, the Chelsea defence was as tight as it has ever been and could set up a counter attack with ease to boot.