|Full name||Kostadin Hristov Dyakov|
|Date of birth||22 August 1985|
|Place of birth||Plovdiv, Bulgaria|
|Height||1.77 m (5 ft 10 in)|
|Playing position||Defensive Midfielder|
|2005||→ Vihren Sandanski (loan)||6||(0)|
|2005–2007||→ Rodopa Smolyan (loan)||36||(1)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 15 December 2016.
He was raised in Levski Sofia's youth teams. After that he played as a loaned footballer for Vihren Sandanski and Rodopa Smolyan. He signed than with Chernomorets Burgas in June 2007 on free transfer from Levski Sofia and joined on 8 October 2009 for a trial to FC Schalke 04.
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