Diego Costa to be given late fitness test following hamstring injury . John Obi Mikel will not be included despite recovering from knee injury . Jon Walters expected to shake off a calk knock for Stoke City . Marc Muniesa expected back after seven games out with hamstring problem .
Diego Costa to be given late fitness test following hamstring injury . John Obi Mikel will not be included despite recovering from knee injury . Jon Walters expected to shake off a calk knock for Stoke City . Marc Muniesa expected back after five games out with hamstring problem .