chelsea will make a late decision on whether diego costa will play in saturday 's match with stoke .
striker suffered a hamstring injury in the premier league leaders ' win at hull last time out and withdrew from spain duty , but may not be considered despite recovering from his knee problem .
stoke 's jonathan walters -lrb- 14 -rrb- challenges poland 's jakub wawrzyniak for the ball as the opposition is the on-loan winger 's parent club that