While the 26-year-old Belgian says he is happy at the Premier League champions, the former Lille playmaker is refusing to close off his options.
Hazard played a crucial role in Chelsea's march to the 2016/17 league title, scoring 16 goals in 36 games.
Madrid have previously shown an interest in signing the goalscoring midfielder, who told reporters: "Of course, I would consider it if Madrid made an offer.
"I am keen to win trophies. It would be great to win the Champions League. But Chelsea's goal is to win the Champions League as well. Honestly, I do not know what will happen.
"I only know that I still have a contract with Chelsea for three seasons and that we just had an amazing 2016-17 campaign. We want to continue on this path and want to build on this in the Champions League.
"I am feeling very well at Chelsea. But you never know what will happen.
"I have not met with the board yet to discuss a new deal. I have two games with Belgium coming up first and I am off on my holiday after that. I want to think about football as little as possible."