The sad thing for Barcelona is about their next games where they don't have two effective players Frankie De Jong and Lewandoski.
De Jong got injured in the game they had against Celta de Vigo and that's why his situation for the next three games and even for the game against Real Madrid is not clear yet.
Also, Lewandoski got injured in the Champions League against Porto and he is still injured.
This can be a pain for Xavi to find an alternative strategy and play without both palyer against a team like Real Madrid.