Inter won thanks to Milan Skriniar's second-half goal.
Conte later said, “We went back being six points clear.
“And in addition, we were playing against Atalanta, a team that takes points from the big teams.
“They are a difficult team, tough, and if you don't prepare well the game risks leaving.
“In my opinion today, they prepared it more wisely than in previous games, maybe because they feared a bit the fact that we knew how to hurt them, and they were a little less vigorous than usual.
“They are three important points against an excellent team. Practically we detached Atalanta from the Scudetto battle, in the sense that we are 13 points clear.
“For me, Atalanta were a tea that, due to the maturity reached in Europe, wouldn't just aspire to a Champions League place but play for the Scudetto too.
“Merit to them, to Gasperini and to the players. They have high-quality players, not only those who play, but the substitutes as well."