Gasperini freely admits that for a decade of his coaching career "retaining numerical superiority in defence was a dogma". However, ahead of a game against Juventus during his second stint at Genoa between 2013 and 2016, he had something of an epiphany.
Although determined to stick with his favoured 3-4-3 formation, he decided to go one-v-one at the back when in possession, thus gaining "a spare man that I could commit to tactical manoeuvres."
"It was worth the risk," he subsequently explained to the Gazzetta. "The Atalanta defenders you see attacking constantly today were born of that intuition."
Such an adventurous approach has been punished at times, particularly by teams boasting bigger budgets and, thus, better players. "Every time we conceded five goals, I thought about potentially playing in a different way," he recently admitted. "But me and my assistant Tullio Gritti – we're stubborn. This season we have managed to have a great run and also continue with our identity."
Indeed, they'd already secured their participation in next season's Champions League via a guaranteed top-five finish in Serie A, while at the same reaching the final of the Coppa Italia, where they were beaten by Juventus.
It's a remarkable achievement for a club with a wage bill of just over €29m (for context, Juve's is €74.1m). For Gasperini, this season just provides more evidence that it is possible for the smaller sides to not only beat the big boys, but to do so by taking the game to them, just as they did in Dublin.
"Just because you're humble, doesn't mean you can't be ambitious," he argued. "I firmly believe you are more likely to get good results if you play good football."
However, as Gasperini and others have been at pains to point out, Atalanta's remarkable rise to prominence just wouldn't have been possible without the Percassi family. "Behind teams that play well and express themselves like Atalanta, there is always great ownership," former Italy coach Cesare Prandelli told the Gazzetta. "The solidity and mentality of the owners have done a lot for the club. Gian Piero deserves a statue in Bergamo. Together with the Percassi family."