It seems that Xavi will use De Jong as replacement for Lewandowski if he cannot recover and play in the match against Real Madrid but De Jong is also playing after recovering from his injury so Xavi has to really consider everything so that nothing bad happens to his players.
However on the other hand some of the latest news also states that Lewandowski can recover on time and can even take part in El Clasico and this is good news even though it is not necessarily true.
But despite all the rumors that have been circulating it seems that Xavi knows more about the Barcelona squad so he can have better plan to be able to perform optimally in El Clasico.
There are still 2 weeks to go for this Elclasico to happen and it is rumored in some reports now that Lewandowski will be available to play in their first El Clasico of the season.
I think this is definitely positive news from Barcelona even though they will be missing Lewa for the next few games, but this El Clasico is not to be missed by Lewa and he should be ready to play if the reports are true.
However, other rumors suggest that Xavi may be starting to prepare with some options at the moment as he is trying to convince Vitor Roque to recover in time. He is a young player who has potential but he is also injured and has not even been able to make his Barcelona debut and it is rumored that he will return in January next year.