But Hiddink believes the winger has the ability to fill in for first - choice striker Costa when he is n't fit or is n't in good form .
Chelsea 's interim manager understands the need for Chelsea to find a solution to their issues up front .
But Hiddink believes the winger has the ability to fill in for first - choice striker Costa when he is n't fit or is n't in good form , although Chelsea 's interim manager understands the need for Chelsea to find a solution to their issues up front .