Aleks Milenov Petkov (; born 25 July 1999) is a Bulgarian professional footballer who plays as a centre-back for Greek Super League club A.E. Kifisia and the Bulgaria national team.
Petkov began his career at Cherno More Varna and joined Heart of Midlothian at the age of 16 in June 2016, signing a three-year contract.
On 22 July 2017, Petkov made his first-team debut, replacing John Souttar during a 3âÂÂ0 League Cup victory over East Fife at Tynecastle Park. On 19 January 2018, Petkov joined Scottish League Two side Berwick Rangers on loan until the end of the season. He made his league debut in a 2âÂÂ3 home loss against Peterhead eleven days later, playing the full 90 minutes.
During the 2019–20 season Petkov was loaned to Clyde and Brechin City.
On 8 September 2020, Petkov returned to Bulgaria, signing a 1-year deal with Levski Sofia.
On 6 July 2023, after a two-year stint at Arda Kardzhali, Petkov joined Polish side à Âlàsk Wrocà Âaw on a one-year contract, with an option for another two years.
On 13 August 2025, Petkov signed with Super League Greece newly-promoted A.E. Kifisia. Hours later, Ã ÂlÃÂ sk released a statement claiming Petkov unilaterally terminated his contract with the club without just cause, and that they would be seeking compensation and fines for both the player and Kifisia.
Petkov made his debut for the Bulgarian under-21 team on 22 March 2019 in the starting eleven for the friendly against Northern Ireland U21. He earned his first cap for the senior national team on 26 March 2022, coming on as a substitute during the second half in the 1âÂÂ2 loss against Qatar in a friendly match. On 16 November 2023, he scored an own goal in the 97th minute in the penultimate match of the UEFA Euro 2024 qualifying against Hungary.
His father Milen Petkov was also a professional footballer and Bulgarian international.