Diego Costa vs Eliaquim Mangala
Question marks over Mangala still remain as he has failed to justify his £32million price-tag since his arrival from Porto last summer.
The Frenchman is likely to come up against one of the best strikers in the league in Costa and will need to keep the Blues hitman quiet if City are to get achieve a positive result.
Costa should be close to 100% after completing 90 minutes last week and will be hoping to lead the Blues to their first win of the season.