Atletico Madrid are coming back to the La Liga after a really valuable win against Dortmund. I think they will reach next phase in the Champions League as well. Simeone is doing his best to keep a balance between the Champions League and La Liga. However they are still under danger of finishing out of top four in the league.

In this month they are playing two tough league games against Girona and Athletic Bilbao. Both are home ones which could be seen as advantage. If they collect 6 points from these games I will be more confident about them to finish in top four. Otherwise they might be in trouble.
Basically Atletico and Dortmund are in the same situation at this moment, because they also still have to work well to maintain their position in the top four of the standings in their respective leagues. But yes, Atletico managed to get the victory in the first leg but even so, Atletico still have to exert their best efforts in the next match in LaLiga because Atletico will play against Girona in thenext LaLiga matchday. Butyes, maybe, because at this moment Atletico is in a good trend and mentality, then maybe Atletico will also still have a good chance to keep getting points at home. Because afterall, Girona is also not as good and strong as before, because lately Girona has also experienced instability and therefore, it looks like Atletico has a good chance of being able to beat Girona as a way of revenge too.
Their victory in the first leg was very beneficial for them, but I was also quite worried when they were pressured in the remaining time of the match. I saw them trying to secure the lead rather than trying to increase the lead they had at that time, as a result Borussia Dortmund were able to steal 1 goal to make their task no more difficult in the second leg. They changed the existing strategy and that is quite worrying in my opinion.
In the second leg, they won't be able to play with a strategy like that, because it will be very risky for them. I hope they can play like their usual game to increase their chances of scoring goals.
In La Liga, they also still have to fight, because their current position is not completely safe to get a place in the Lifga Champions next season, especially since they will still have tough matches against their competitors in the same standings fighting for the top 4 places.