If you look at the performance of the two teams in their respective leagues, Inter Milan's chances of qualifying for the next round will be much greater, even though the match will take place at home to Atletico Madrid. But Inter Milan also have to be wary of Atletico Madrid, apart from being experienced in the Champions League, another advantage is that the match will be held at home. I don't doubt Inter Milan to qualify for the next round because they have a good defense so it will make it difficult for Atletico to restore the goal aggregate more quickly.
I put two to three top teams this season in the Champions League, apart from Real Madrid I have confidence that Bayern Munich is a strong candidate to win this season. Of course, we don't ignore Manchester City as the defending champion, but there is an opportunity for competition between the three clubs to compete for the title.
In most cases, we never judge teams with their domestic performance because we have history of matches while teams were not good into their domestic leagues have impressive performance and success into UEFA competitions so in this case things can go as well even Inter Milan is having good first leg game and their chances are bright but still Atlético Madrid is also never been easy team to play at their home against any team with few weeks back they beat Real Madrid and won their match.
Here if we have success for the Inter Milan surely this could be good for them and chances could be high for them to go through until semifinal or final as well because they have good squad which is giving his best and their experience is also going to be important for them in coming matches while they will be gone for the second leg game in Spain.
Inter has been very strong this season, and they have being consistent in their matches. They have only lost one game, which tells how strong they are. Inter reached the finals last season, and from the look of things, is like that is also their target this season, which is to make sure they reach the finals. They are experienced, and more determined this season compared to last season.
Atletico Madrid cannot be underestimated, because they have shown some brilliant performances in the matches this season which should make any club playing with them to be very careful, when playing them in Spain. Diego Simeon will do his best to see that his team will win Inter, but will Inter allow them to penetrate their defense, and snatch away the victory from them, because Inter have more advantage for lead with 1-0 aggregate.