Adan saw little action last season under the new Chelsea manager.
"I tried to work even harder and give my best for the team but the club decided to sign another goalkeeper. The coach's job is to select his team every Sunday and all I can do is keep working hard and accept what decisions he makes.
"The declarations which Mourinho made in public are there for everyone to listen to and that question would be better directed to him than to me.
"I am not able to say why he suddenly lost confidence in me. But I have no hard feelings towards Mou and I respect his decisions."