It makes sense and indeed when talking about them there is certainly more talk about Barcelona and Real Madrid who come from the same league. It doesn't mean they are bad, but in terms of name they are still inferior and the 2 clubs I mentioned still have more appeal.
Maybe it would be different if the situation was that they were the only club representing La Liga. And actually if you compare, then the other clubs are the same. There are clubs that get less attention because more people are more interested in other teams that are considered more interesting to talk about.
Clubs from Spain and La Liga as representatives for the league have some successful clubs, and they are Real Madrid, Barcelona and Atletico Madrid. We are talking more about Real Madrid and Barcelona because those clubs have more star players, richer than Atletico Madrid and they won more Champions League titles than Atletico Madrid.
In last two decades, Atletico Madrid played well in Champions League too but it's still worse than Real Madrid and Barcelona. This season is nearly similar and Atletico Madrid will have to face directly with Real Madrid in round of 16. Expectation on Atletico Madrid is less than Real Madrid but if they win and go next to quarter final phase, it will be time to recognize them as one of strongest candidates for the title.
Athletico Madrid can't really challenge Real Madrid in the Champions League, but they can get the opportunity in the league or other trophies. When it comes to the Champions League, Real Madrid is always a different club and it's very difficult for any club to defeat them in the competition. Barcelona has more talented players than Athletico Madrid, and Barcelona usually defeats Barcelona in the La Liga, but this season was different because even Madrid hasn't yet won Athletico in the league, all there first and second leg are probably end in a draw, but Athletico Madrid get the chance and defeat Barcelona at home in the league fist leg, we don't know if they can still get the chance to do so in the next leg.
Madrid will face Athletico Madrid in the opening leg of the UCL next week, and I am confident that Madrid will do everything necessary to win at home because they are playing in Madrid first. And, once again, I believe that Athletico Madrid has never had the opportunity to defeat Real Madrid in the Champions League. This season madrid have crucial players on the team and am sure they can probably repeat the past and defeat Athletico Madrid in the first leg and second in the competition. Barcelona are facing Benfica and that game will be an easy win for Barcelona since Benfica are not excellent as Barcelona this season and probably Barcelona will qualify to the final this season in the ucl however we can't predict what will happen in the competition, but am in my opinion i think Barcelona are doing well currently and he show good quality that they will get to the final.