Villarreal is very close to Real, only one point difference, and while Real is not in the best form they can try to take advantage of it, but the main thing is not to try to sit near their goal, because Real will find a way to score. It is also important for Villarreal to put pressure on Real's defense, although it seems to me that they will be happy even with an away draw. Courtois is absent from this match, but it seems that Lunin played well in the Champions League match, it was difficult to save the penalty, but otherwise he played very well.
While it is true that points-wise they are close to each other, we all know that Real Madrid is the better team and they should be able to get the win. I understand why people doubt, we have seen them not play that great all season so far, while they did win some games, they didn't look convincing and they finally lost to Lille, which was the nail in the coffin proving there is something wrong with that team.
However, I believe we are going to end up seeing Real Madrid still end up winning this game, they are just too good not to. They are also close to Barcelona, they can't lose points now, they need to win every game until they catch up to Barcelona, otherwise the points gap would grow and Barcelona will play Alaves, which they should be winning.