The chances for Barcelona to catch up with Real Madrid points is very slim, and I must tell you that in the El Classico match to be played this evening, that Real Madrid will win Barcelona and increasing the points difference, which makes it to be impossible for catching them up to happen.
Barcelona might have come back to their normal dorm but, it will be a very difficult task for them to win Real Madrid even though, they are the defending champions. Real Madrid is also in their best form and Ancelotti will make sure that he comes up with a better strategy that will overpower Xavi's own tactics.
Chasing madrid's points difference is of course very difficult for Barcelona but that does not mean impossible for Barcelona in my opinion, Barcelona must win the game against Madrid today at least to cut the gap between the two teams and if Barcelona wins of course Madrid will start to pressure at the top of the standings later, yes indeed against Madrid will be difficult for Barcelona because this season Madrid Is too great in dominating La Liga but that does not mean Barcelona also has no chance to I think today's El Classico will be very important for both teams in securing their positions in La Liga including Madrid to be able to move further away from Barcelona.
At the moment both teams are in perfect condition to face the game later, so I think both teams still have the same chance to win the game although I am more inclined to see Madrid will be able to beat Barcelona again this season, since Xavi decided to step down as Barcelona coach, precisely now the improvement of Barcelona game is very drastic and we can even see how Barcelona can trouble PSG in the Champions League.