I'm not at all surprised by the draw in the Rayo Vallecano vs. Barcelona match...
Well, in theory, the bookmakers had predicted that Barcelona would win, even though Rayo Vallecano is difficult to beat at home, we are talking about a notable difference between the two teams in terms of player strength and coach strategies, it seems to me that Barcelona is not in such good shape.
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.