The match against Arsenal has passed, and it can be said that it was a pretty good result because they were able to take home one point from Arsenal. So in the next match Atalanta can steal points from Shakhtar Donetsk, Celtic, VFB Stuttgart, and Young Boys. I don't think those four clubs are weak but I see those four clubs have the same quality as Atalanta so Atalanta's hopes of stealing points in that match are very possible.
However, that scenario could happen if Atalanta continues to improve the team and continues to increase its strength. Because lately Atalanta's performance has been below standard, in the domestic league alone they lost to the promoted club Como. If there is no improvement in performance, it is likely that this scenario will fail and it is certain that Atalanta will not qualify for the last 16.