Both teams show their best game but on the field Real Madrid always appear more impressive when they target victory. In the Champions League Real Madrid will do everything to achieve victory even they are able to play better compared to their performance in Laliga. But for Atletico Madrid they still have the opportunity to do their best in the second leg later because they will play at home.
In Laliga Real Madrid must also focus well because they are already 3 points behind Barcelona. The defeat in the previous match made Real Madrid's ranking drop to third place. Ancelotti should not waste another opportunity because if they lose points again then Barcelona will benefit greatly.
Real Madrid is facing a difficult situation at the moment. They have to focus on 2 tournaments, which is draining their energy. They have to win when they meet Rayo in the next La Liga tournament, and in the next 2 days after, they have to win also when face Atletico. But Real Madrid has an experienced coach, and Anceloti often faces this complicated situation, and continues to get the trophy. Except if the squad isn't complete, yes, a key player like Bellingham should be playing in the next match to minimize the lag points. I'm not quite sure, has the suspension been completed? due to yellow card accumulation that make Bellingham can not playing on champions league, and also La Liga when meet osasuna.