Michy Batshuayi scored with the last kick of the game to secure an impressive victory.
But when asked if the Blues were now Champions League contenders, Conte refused to buy into the hype.
Conte said after the match: “I think we have to game by game and above all keep the right humility. This humility last season brought us to win the league despite other teams being stronger than us.
“I think this season we have to keep the same humility and this type of game, this win, can increase our confidence but I repeat, our target is to try to be competitive.
“We know very well in this competition there are very strong teams, Atletico Madrid is one of these teams, and I think we are starting to build something important.
“Before we win this competition we must improve season by season, improve our team, experience.
“Don’t forget we are a very young team but we want to do our best in every competition and you know very well the Champions League is a big competition. There is a great desire to show we deserve to play this type of game.”