We know the problem of Barcelona this season, they have been under pressure and this is basically having a negative impact on their players. Injuries and fatigue have cause good players decline in performance and this is terribly below the require standards of the team.
The international break really has a big impact on clubs. The large number of matches causes players to constantly suffer injuries. But for a team as big as Barcelona, injury and fatigue problems are not a reason for not being able to win the match, I think so.
Today's draw against Rayo Vallecano means Barcelona are struggling and not back on their feet this season. Xavi Hernandez should comprehend everything within his reach if he's still keen on winning league games and becoming more active in the competitive title race. Barcelona can sign players but it's going to be limited due to the cases they face in FFP.
In that match, Rayo Vallecano itself performed very well and solidly. They have proven this not only to Barcelona but also to other big teams who managed to hold Real Madrid to a draw. This draw made Barcelona drop to fourth place, of course this will be a big job for Xavi to continue to build a stronger strategy in dealing with situations like this.