In my opinion, Atalanta are not very strong this season, they have just suffered two consecutive defeats in Serie A. Arsenal, who are performing well, are one level above Atalanta, but Arteta must remain focused by fielding his best squad in order to achieve victory. Atalanta were so easy to beat in Serie A, they are very difficult to repeat the success achieved in the Europa League last season. Arsenal have always been consistent in maintaining their performance, especially this season their motivation is increasing to win the title, so Atalanta will not be too difficult for Arsenal.
I agree Atalanta this season is not too strong, when competing in the Champions League sometimes teams that perform poorly in the Domestic League can surprise us. The motivation is very different and the aura to give the best is always seen from unexpected teams. Arsenal overall is very promising and I expect 3 points for them, but the presence of Atalanta cannot be underestimated, it can give Arsenal an equal fight. The fight between teams from the Premier League strategy and teams from Serie A will certainly be quite entertaining for us. Let's say Atalanta doesn't have a high chance in Serie A to lead the standings, then they can focus their players to maximize their chances in the Champions League.