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.
Atalanta have been an improving side overtime. They've had some rough edges but their performance in the league is still seen. Even though they may not be top trophy contenders, they're trying to stay in the domestic league instead of relegating. They'll be playing against Leverkusen in the final phase of the UEL and goodnews is they've been able to gather enough confidence and momentum for the game which still puts them in and advantageous spot of finishing with a tangible result regardless.
Atalanta sadly lost to Juventus last night in the Copa Italia finals which then leaves them to struggle solely for just the UEL trophy. Their opponent definitely won't take it lightly either. If yesterday's game had turned out in their favor, then maybe they'd have had a resounding confidence to face up Leverkusen but at this point in time, they're left to dedicate all resources available and necessary to fighting hard to earn the trophy.
In their Serie A game tonight, they were up against US Leece and they were as well the visitors in the game. Well based on the overtime strength, we expected them to earn the 3 points entirely but Leece also can be unpredictable, being that they were the host and they've had an average scoring ability. So it was best to range the game outcome with Atalanta having the greater chance of victory.