Dortmund - Germany midfielder Ilkay Gundogan is set to leave Borussia Dortmund after turning down an offer to extend his contract past 2016.
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Dortmund says Gundogan has "decided not to extend his contract." Dortmund is likely to try to get a transfer fee after the season, rather than let one of its key players leave for free at the end of his contract next season.
Dortmund chief executive Hans-Joachim Watzke said last weekend that the club would let Gundogan go if it received an "adequate offer."
Gundogan is the third Dortmund star to leave the club, after Mario Goetze and Robert Lewandowski departed in successive seasons for rival Bayern Munich.
Dortmund coach Juergen Klopp is also leaving, to be replaced by Thomas Tuchel.