Chelsea's goalkeeping coach Michele De Bernardin does not only train Robert Sanchez and Filip Jorgensen on how to catch and clear, dive and deny. The Enzo Maresca lookalike - rest assured, I've seen both Italians in the same room - occasionally works with the outfielders too.
He teaches the players where to be and when, perfecting their positioning so there is always a pass available for their goalkeeper. Video sessions are arranged at Cobham for this very purpose.
It is therefore vital that Chelsea have someone between their sticks with feet as safe as his hands and a brain to match.