Seeing Inter's game in this match, it feels like Inter will qualify for the next round. Inter Milan's game is getting more solid and developing, just extraordinary. Arnautovic was just a little unlucky with his chances, even though he managed to score Inter's winning goal, it must be admitted that Arnautovic had many chances but his finishing was still poor.
However, Arnautovic's last few matches have been quite good, from possession of the ball today against Atletico he was quite good, it's just that his confidence needs to be improved, if he scores again in the second leg then he will be more confident.
Good results even though they are not yet safe, Inter must not be arrogant and remain focused, hopefully they can get good results in the second leg. Because overall Inter played well, be careful during the second leg because Inter only needs a draw to qualify for the next round.
I do agree that Inter has to be playing with 100%, but I believe that as long as they play with their 100% then they should be able to get the win, it doesn't really look like they would lose. I know that Inter is a great team and they are looking quite strong these days, but they need to keep this up.
The win over ATM was definitely a great thing for them, they must be quite happy about it, but it will be an away game so they need to be very careful with what they are doing, otherwise it will not be all that simple for them. The best way to go about this would be making sure that they are getting a good return, otherwise it will not make any sense at all, they can't just go out and play all defensive full game.