Athletico Madrid is the favorite of winning the game.
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No, they are not!

It's a pretty tight match and even if the odds were in their favor you couldn't call them favorite, just more appealing but no way in this you can just pick one and say no problem they will win. It's true that Real is without Mbappe but so is Ateltico missing a key defender in Azpilicueta if I got his name right!
Besides it's one of those derbies where every team gives it all, we just saw a surprise in Milan last week, Real winning this own would be even less of a surpise.