Career
On 27 June 2012, Petkov joined Neftochimic Burgas. He made 23 appearances, finishing as the club"s top scorer with 14 goals. Petkov made his A PFG debut on 21 July 2013, when he came on as a half-time substitute in a 4–1 away loss against Litex Lovech.
Petkov joined in the summer of 2014.
He scored his first goal for the team from Varna on 13 September 2014, netting a late equalizer in a league match against CSKA Sofia.