The result may not be bad. However, I could not be satisfied with Arsenal's performance in this match. And if Arsenal perform like this, they won't do very well in the Champions League.
Atalanta were strong opponents. But even then, Arsenal should have tried to dominate the match. Arsenal players managed to make only 6 shots in the full 90 minutes. We definitely don't expect this kind of gameplay from a top tier team. Atalanta's aim was to share the points in the match. That's how they managed to do it. Arsenal should change their match tactics. At the same time the forward players have to perform better.
There's a lot to take out from this first games that all the 36 teams at the UCL has played so far and even though the likes of Barca has lost her first game while inter, man city, Atalanta and arsenal have only gotten a single point for themselves, it only tells us of how competitive the champions league is and we can't certainly make any guess as to what the table will look like from week 2. Of all the big teams that has an high on the trophy, arsenal seems to be the one with the toughest of teams at the start of thier champions league campaign. After this first draw against Atalanta, thier next rival is still a tough opposition, PSG. If they get another draw or loose the game which somehow I feel one of them will likely play out, it's going to affect them psychologically in Thier coming games both at the champions league and the base league.