[2] Kirilov was signed by Serie A club ChievoVerona from Rimini in 2010, but was unable to break into the first team and spent time on loan with Lumezzane, Carpi, Venezia, Cremonese, Südtirol, Beroe and Pirin Blagoevgrad, before joining Vis Pesaro permanently after his release by Chievo in June 2018.

[3] Kirilov made his first team debut in a 2–0 2010–11 Coppa Italia win over Sassuolo Calcio on 28 October 2010, coming on as a substitute for Davide Moscardelli.

[5] On 10 June 2016 Kirilov returned to Bulgaria, signing a year long loan with Beroe Stara Zagora.

[9] Kirilov made his first UEFA European Under-19 Championship qualifying round appearance for the Bulgaria under-19 side on 7 October 2009 in a 1–1 draw against Northern Ireland.

[10] He earned his first cap for the senior national team on 13 November 2016, coming on as a second-half substitute in the 1:0 win over Belarus in a 2018 World Cup qualifier.