I think Madrid will aim to wrap up the league title sooner to pay more attention to the UCL.So they will try to beat Barca today no matter what, because if they win today their Laliga Title is secure. On the other hand, Barca will try to keep their season alive by defeating Real Madrid so it will be a different battle in a different mindset.
And everything is literally in favour of real Madrid at this point, they have good chances for winning both leagues and Madrid actually tried there best and if they win it they actually deserves it. And if they are able to win the la Liga and they are able to focus on the Champions League then the chances will increase, there will be more energy to pour in. Madrid vs Barcelona eventually we know who is going to win.
Real Madrid will not allow its closest rivals to win at home to Real Madrid today, because it is not just about the title this season. But it is also about the prestige of a team like Real Madrid, which would be quite embarrassed if they were defeated by their closest rivals at home in today's match. So it will be quite possible for Real Madrid to play as well as possible today in order to win at home and this will also make it easier for Real Madrid to win the La Liga trophy this season.
Madrid will fight at with any opponent since they were able to eliminate Manchester City that was a threat it also about the title because last season wanted the title untill Manchester City removed them so it shows that the tittle is important to them. Winning two of this titles is actually worth the celebration. The only problem that Madrid will be concerned about now is Barcelona but even them won't be a problem.