Belgium international Courtois is due to report for pre-season on Monday morning but is pining for a move to Spain.
Courtois has a season left on his current deal which exposes Chelsea to the possibility of losing him for nothing next year.
The goalkeeper’s agent Christophe Henrotay has called on the club to grant his client a move to the Spanish capital, where his children live with his ex-partner.
Sarri appears to be ready to let Courtois leave before Thursday’s transfer deadline, provided the keeper tells him he wants to leave when they meet face-to-face on Monday.
‘I have no reaction on the agent. I’m not interested in the agent,’ said Sarri.
‘I want to hear Courtois. If Courtois says the same, I have to speak with my club of course because I only want players with a very high level of motivation.’
Courtois himself refused to comment further on the speculation on Sunday. The goalkeeper was a special guest at a friendly match involving former club Genk.
Asked about the transfer saga, he said: I’m not going to comment. It’s all delicate. I’m relaxed at the moment.’