Chelsea v Aston Villa: Preview Didier Drogba's knee injury rules him out of Chelsea's Barclays Premier League clash against Aston Villa at Stamford Bridge. The striker joins Deco (thigh), Ricardo Carvalho (knee) and Michael Essien (knee) on the sidelines. Ashley Cole (back), Joe Cole (hip), Alex (buttock) and John Terry (back) all are hopeful of being fit but may require late checks.