Born in
Burgas, Yanev started to play football in local club
Naftex. In 2004, he was loaned to
Pomorie. In 2005, Yanev returned to
Naftex Burgas. After that the midfielder played for the other club from
Burgas ––
Chernomorets. In January 2008, Yanev signed with
OFC Sliven 2000 and five months later joined the club champion of
Bulgarian second division. Next season in the
top division Kosta left excellent impressions in the football specialists with his good play. In November 2008, the national coach Plamen Markov called Yanev in
Bulgaria national football team for a friendly match with
Serbia. On 24 June 2009, Yanev signed a contract for 3 years with
CSKA Sofia. On 15 August 2009, he scored his first goal for the "armymen" in the 3–0 home win against
Beroe Stara Zagora in a
league match. ==External links==