Last week Blues boss Antonio Conte admitted he wasn’t sure what Costa’s future held but now it may be clearer.
He said: “I can say today that Costa is a Chelsea player.
“He didn’t play in this game because of injury and if he solves this injury and I see him in training and he is in good shape, then it can be possible to see him in our next game against Milan.
“I speak for today and today Costa is a Chelsea player. Tomorrow, if you ask me if Costa will remain with us, I don’t know.”