Shakhtar Donetsk midfielder Chelsea is a long-term Douglas Costa target . Douglas Costa want assurances about a long-standing knee concern . Costa is also a target for Real Madrid , Barcelona and Manchester United . READ : Chelsea dreaming of summer move to Douglas Costa . CLICK HERE for all the latest Douglas Costa news .
Shakhtar Donetsk midfielder Douglas Costa is a long-term Chelsea target . Chelsea want assurances about a long-standing knee concern . Costa is also a target for Real Madrid , Barcelona and Manchester United . READ : Douglas Costa dreaming of summer move to Chelsea . CLICK HERE for all the latest Chelsea news .