The Belgian revealed earlier this week that he'd come to a decision over whether he would sign Chelsea's new contract offer, reportedly worth £300,000-per-week.
Real Madrid are keen on the 28-year-old winger, and Hazard says he will let his decision be known soon.
He told RMC Sport: "I know what I'm going to do. I have decided.
"For now, the only thing to think about is playing well for Chelsea.
"I have a year-and-a-half left on my contract, everyone knows.
"My decision will be known soon, but it's not something that affects my mind.
"I think about it, but without thinking about it. When I'm in the field, I just want to play. We'll see what happens after."
Pressed again as to when those in London and Madrid can expect to be made aware of his plans, Hazard added: "I do not know, we'll see.
"I will wait for the right moment."