[1][2] On 24 September 1999, he scored a last-minute goal against Litex Lovech in an A Group match to bring the score to 1–1 in the heated derby encounter, prompting a brief pitch invasion by joyous Levski supporters.

Sirakov was also notable for his sportsmanship, on one occasion shaking the hand of referee Atanas Uzunov after receiving a red card in a match against CSKA Sofia.

[3] After first receiving a call-up for a friendly match against Morocco prior to the 1998 World Cup, but withdrawing due to an injury,[1] Sirakov made his debut for Bulgaria against Poland on 6 September 1998.

[6] In August 2024, Sirakov was appointed as interim manager of the first team after Georgi Dermendzhiev stepped down as head coach following the club's elimination from the Champions League.

[7] In his first match in charge, he led the “eagles” from Razgrad to a 1:0 league win over former club Levski Sofia.