Atalanta president Antonio Percassi admits qualifying for the Champions League round of 16 left him in tears.
La Dea are making history in their first run in the competition.
"I had decided to stay at home, where I could be alone," he told the Gazzetta dello Sport.
“I preferred it this way: I wanted to enjoy it more, I wanted to be able to despair or cry for happiness. And I cried alone.
“Every now and then, my seven-year-old son Michael would enter. After 1-0, I really believed. I saw how focused they lads were."
Atalanta lost their first three group games.
Percassi added: "After the first matches, they already wrote us off, talking about a lack of experience, emotions from our debut, but then in the next three we played great football and wrote another chapter.
“To the team, I more or less said: 'You have done something extraordinary, unique, historical. You gave us a dream.'"