Sure, I am a Real Madrid fan, I hope Atletico suffer defeat or get a draw result, but I think it isn't likely to happen in the upcoming match. Just consider the chance, have you checked the performance of the Celta Vigo team in the last 5 matches? It was so bad, they even never won any single match, 3 losses & 2 draws. How we can hope for a tough game? While Atletico perfectly won all matches. Also, they will play at Home.
Atletico Madrid has a good season so far and they have one additional match to play. If they win that match, it is unrealistic for Real Madrid or Barcelona to reach Atletico in the title competition. Celta Vigo are not the team can steal points from Atletico. It is possible for lost points from them till the season ending but I don't think it will be enough for Barca and Real.
As I said, Barcelona's defense is in trouble and they are very fragile in defending from the onslaught of opposing players. As a result, they have conceded 18 goals in 20 game or an average of 0.9 goals per game.
The quality of Barcelona's defense is known for years and this year, when they have to rebuild their team, tactics, this loophole only is more clearly.
But even if you are a Real Madrid fan, you also have to admit that Barcelona still hold an unbeaten record, at least better than Real Madrid at the moment. Real Madrid and Barcelona both have 40 point but Barcelona are much better in term of their goal productivity.
In the previous match, Real Betis lost to Barcelona 5-2 and at that time Barcelona was not consistent. Barcelona's condition is much better now, so what are your doubt about Barcelona ?
Real Madrid and Barcelona situations now are opposite of theirs in the last season. In the last season, Real Madrid came back impressively after lockdown and suspension of the league while Barcelona flipped down and lost all their advantages before. In this season, Barcelona improved their results over matches.