I didn't say that Atalanta has qualified for next season's UEFA Champions League; what I said was that the win Atalanta had against Lecce has given them hope of qualifying for next season's UEFA Champions League because Juventus is leading them by one point and there are two remaining matches for the Serie A season to end. For a long time, Juventus has been struggling to win their matches in the Serie A, which has put them in this condition, and if they continue with such performances, Atalanta might overtake them in the Serie A table. Juventus next match is against Bologna, and they might likely drop points against Bologna, which will give Atalanta an advantage to enter the top four of the Serie A table if they win their match in Serie A.
With Serie A having a share of five clubs that will play in the Champions League next season, Atalanta will certainly play in the competition, because the difference of six points from Roma who are in sixth position is difficult to match, even though Atalanta will probably still be ahead in goal difference, so Atalanta has already qualified for the Champions League and Roma has lost the opportunity to play in the Champions League, so Atalanta's victory over Lecce not only opens up their opportunities but they have indeed got that place.
However, if I judge their performance against Lecce, it was not an impressive performance so I doubt they will be a competitive team in the Champions League unless they make some changes to their squad.
You're right about Atalanta. Getting into the Champions League? Without a doubt a big win. Money, fame, and the Major League. They beat Lecce easily and are now six points ahead of Roma. Trust me, those fans deserve a party. Not to do too much. Have you seen that Lecce game? That wasnt very strong, was it? Competing with the best in Europe is not the same as making the cut. Its its own game. You need to be strong, smart, and fast. They work, but a few important changes could really make a difference. Moving this summer? Big, wait and see.
But dont think too much about it. It should make Atalanta happy that they won. It was won the right way. Next season, they might surprise everyone. They should be the best team in the world. Soon, we'll see.