Not only the bookies, majority of gamblers believed that Barcelona would win Rayo and they lost their bet. This is the reason why no team should be underestimated because no one can predict the future. I couldn't believe that Barcelona almost lost that game. Rayo has poor finishing and couldn't score more goals. A lot of work needs to be done in Barcelona defense because it looks porous to me.
There are many surprises in football and this is one of them and it must be admitted that Rayo Vallecano is a strong team when playing at home but if we measure the strength of both teams it is clear that this is a big surprise that happened at the beginning of the La Liga season this season although we should not be too excessive because on the one hand I see Barcelona as if they were unlucky so they could not bring out their best performance so I will not also respond to Barcelona's performance because in my opinion from this one match cannot be used as a reference for anything.
Despite football is full of surprises, i didn't expect to see this kind of match against Barcelona because the Load are very light to carry now so I didn't see any pressure on them. But this should surprise anyone because that was how Barcelona played against levante by allowing them to score two goals in the first half, this shows that there's something wrong with Barcelona with the way they are playing this recent games. This is not normal for Barcelona to play draw against Rayo Vallecano I don't see them as obstacles for Barcelona despite they hosted the match. Barcelona was so lucky enough to even have penalty to score, if not that is how they will lose the match,