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Valencia is in a bad state, but I find it tough in La Liga anyway. Frankly speaking, even Girona and Mallorca are not completely safe yet and that is about 10 teams to still fight for their place in La Liga. I think Celta Vigo won't have much to do with relegation, but of course it could theoretically still happen.
Yeah, it was a strong club, but not for this season. How they play so far, and moreover when against Atletico Madrid was quite bad. Additionally, even though they have been trying much better, I think that it is actually not enough to survive. badly, now, Valencia is in the relegation zone, like Sevilla at that time.
Sevilla or Cadiz will be happy with any type of win, whether it is a narrow one or not, the both of them desperately need points if they do not want to be relegated.
Indeed, with the same point, they only need a victory to be over each other. But I don't think that this match will be an interesting match if we look at how they performed so far. They may be struggling to at least not lose the points, but how far and how good their performance will be still questionable.