Courtois last week declared it was crucialChelsea secured Hazard to a new contract - and resist all offers for the Belgian.
Hazard responded to Courtois' comments in the French media, telling RTL: "I will answer you the same as Thibaut.
"First, he must sign, then I will be able to continue. I do not know who will be the first to sign his new contract.
"It's a secret..."