The Spain worldwide was the subject of interest from Tianjin Quanjian in the January transfer window.
Diego Costa has responded to reports that he has agreed to a big money move to China by posting a messge on Instagram.
Costa is believed to have reached a £30million-a-year pre-agreement to move to Tianjin Quanjian in the summer, according to radio station Cadena Ser.
Antonio Conte has since addressed those rumours and while he insists Costa is happy at Chelsea, the Italian admitted anything is possible where the summer is concerned.
The Chelsea boss said in a press conference when questioned about Costa's future: "I don't know". "Now the most important thing is to be focused on this championship".
'Diego is an important player for us, is happy to stay with us, for me these are the most important things, not what happens in the summer. "It is important to be in the present than look to the future".
The Spain global had a training ground dispute with a member of the Blues' backroom staff last month and reportedly asked for a move away.
It would appear that every match day this season is yet another occasion for Chelsea's Diego Costa to steal the headlines for various reasons.
To lend credence to his manager's assertion, Costa sent out an x-rated post using his Instagram account on the same day, furiously accusing the media of "talking too much s***".
The Blues head into Saturday's clash top of the Premier League and nine points above Tottenham and Arsenal, who sit second and third respectively.
The issue appeared to have been resolved when Costa made a goalscoring return to the first-team fold and Conte declared the Spain global happy at Stamford Bridge.