The centre-back is nearing the end of his contract at Stamford Bridge and his former team-mate believes he should not look to move to another club
Michael Ballack says John Terry should remain at Chelsea, insisting he should stay at the highest level he can.
Ballack: Costa needs to show loyalty to Chelsea
The 36-year-old centre-back has played just five Premier League games this season and his contract expires at the end of the campaign, having signed a year extension upon Antonio Conte's arrival in the summer.
He was linked to a move to Bournemouth after the Blues recalled Nathan Ake from his loan at Eddie Howe's side, though Conte maintains he will not be leaving this month.