The 21-year-old has emerged as a target for the Blues with Manchester City and AC Milan also interested in the centre-back.
But Subotic's agent Stephen Kelly claims Chelsea would have to break the bank as the player has just agreed a lucrative four-year deal with the Bundesliga side.
A fortune: Neven Subotic has signed a new contract at Borussia Dortmund
Kelly said: 'It will take a hell of a lot of money to get Neven. He'shappy with his new four-year contract. It's a bloody good one, too.'
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