After the match, Real Madrid lost against Atletico Madrid some players in Real Madrid are now under more pressure and there is a chance for some punishment for these players.
What punishment do you mean?
If you mean Ancelotti will give the players punishment, it depends on the situation. Ancelotti doesn't have many options of the players, he can't give the punishment to not playing. He must be aware that he must focus on other competition (UCL, La Liga). Playing on those higher level competitions requires all the players of Real Madrid. Ancelotti even has a lack of players in attacking line.
Media are talking about Real Madrid being punished by Atletico Madrid rather than players being punished.. After all it isn't an important competition comparing to La Liga or UEFA Champions League.
I think that game will be a lesson for Ancelotti and Real Madrid players since the team couldn't keep a good form until the end of the game at the opposite of the last year where they made nice comebacks! I think Benzema lost Real Madrid and Real Madrid lost Benzema this season!