Career
Slavia Sofia
Born in Sofia, Velkov began his football career with Slavia Sofia in 2005. He made his first-team debut on 27 July 2013, at 16 years 227 days, coming on as a substitute for Hristo Yanev in a 0–0 away league draw against Cherno More Varna. On 18 December 2013, it was reported that Velkov was on trial with Manchester United.
After the great debut season and few trials in big european teams, Velkov got a serious injury, which would get him out of football for minimum of 6 months.
In March 2015, Velkov extended his contract with the "whites" for a further three years. He returned to training in April, but he didn"t got part from the further matches, so he didn"t take part from all matches for the 2014-2015 season.
Velkov returned in play in the first match of the 2015-2016 season agnist Lokomotiv Plovdiv as a substitute in the 88th minute. International Velkov represent Bulgaria in U16, U17, U19 levels.
On 1 June 2013 he made his debut for Bulgaria U21 at age of 16 years, 5 months and 22 days becoming the second youngest player to debut for the team after Nikolay Mihaylov.
On 25 March 2016 Velkov was in the starting lineup for the goalless draw with Wales U21.
