Barcelona don't want to lose points now after they drew with Rayo Vallecano, because every next loss of points will give Real a reason to increase the gap. Valencia lost to Osasuna in the first match away, I think it will be even more difficult for them against Barcelona away, so yes, Barcelona should win this match. But the odds are too small for a win, so this match will be combined with other matches. But I'll probably just skip this match and see how Barcelona plays, I want to make sure that everything is okay with them.
Playing at home against Valencia its moment for Barcelona return back to winning moment after being by Rayo Vallecano last games, during international break there are not any Barcelona's players got injury and most of them already for upcoming match. Last three games result, Valencia is not easily opponent team for Barcelona because have won 1 of 3 matches, being draw one games and getting loss one games from Osasuna.
Barcelona have many players play for national team in this international break seems Hansi Flick won't play them as early minutes, Valencia must take advantage if Hansi Flick make rotation and getting one points become best result.