Chelsea came from behind to beat Diego Simeone’s side at Wanda Metropolitano Stadium, with Michy Batshuayi scoring the winner in the last minute.
Hazard joined Chelsea the summer after they won the Champions League in 2012. Their most noteworthy victory in the competition since then was beating Paris St Germain 2-0 in the quarter-final two years later.
However Hazard feels the victory over Atletico, who have reached two finals and a semi-final in the last three years, puts all his previous European victories with Chelsea in the shade.
When asked if Chelsea’s triumph was the best of the season so far, he replied: “Yes, but in the Champions League also.
“Since I came here, I think it is the first time we have beaten a really good and strong team in the Champions League.
“We did well. There were not just a few moments, it was from the first minute to the end of the game. That means we are a good team and have good players.
“We should have scored more than two, but sometimes it’s good win at the end, the feeling is very good.”