[4] In June 2023 it was announced that Kostov won't renew his contract with Benfica and will leave the team.
[5] Few days later he returned in Bulgaria and signed a 3-year contract with Lokomotiv Plovdiv.
[6] He scored his debut goal on 7 September 2023 in a league match against Hebar Pazardzhik, but minutes later was injured and set to miss around 6 months.
[7] Andreev was called up for Bulgaria U21 for the 2025 UEFA European Under-21 Championship qualification against Estonia U21 and Israel U21.
This biographical article related to association football in Bulgaria, about a defender, is a stub.