During a 2008–09 season, after a few poor performances along with the impressive form of Miroslav Manolov and Yordan Yurukov, Andonov found regular starting positions in attack hard to find.

In February 2012, Andonov was released from his contract and returned to Beroe Stara Zagora as a free agent.

[4] He scored a hat-trick in the opening game of the 2012–13 season against Botev Vratsa on 11 August.

On 15 May 2013, Andonov led Beroe out as captain in the 2013 Bulgarian Cup Final, which they won 6–4 after penalties against Levski Sofia, as Andonov collected his second Bulgarian Cup winner's medal.

This biographical article related to association football in Bulgaria, about a forward, is a stub.