The 21-year old spent last season on loan at Ajax, scoring 9 league goals in 22 appearances.
And now, having appeared only 16 times for the Blues since moving from Auxerre in 2013, Traore is expected to spent his third stint on loan.
The Burkina Faso forward also spent a successful 18-month spell with Vitesse Arnhem.
West Ham and Everton have also been linked with a move for Traore.
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