That's basically what counts in football especially when you are fighting head to head with other teams for the title. Barcelona currently are a very free flowing side with them being able to score as easy as possible and them struggling yesterday just shows how the leganes defense was really tight because Barcelona is one of the team currently you will play that definitely hard to defend against them.
Sure, thier defense line was very tight which is why barcelona was finding it very hard to score. And if not for the fact that barcelona is tactical definitely they would've ended with goalless draw, but all thanks to de jong. You know at this point I think they have now secured the la liga title because the point gap between them and real madrid is a little bit far, and I think they will now make use of this opportunity by not allowing real madrid to come close to them.