He made his professional debut for the team on 11 November 2021 in a league match against CSKA Sofia.
[3] One week later, he played his second league match against Ludogorets, but was sent off with a straight red after a heavy foul.
[5] On June 1, Slavia's owner, Ventseslav Stefanov, announced that the deal was almost completed and Martin would sign with Barcelona for 2 years, however, the final agreement between the two clubs ended up being a one year loan deal with Barcelona's Juvenil A team.
[7] In September of the same year, he was named by English newspaper The Guardian as one of the best players born in 2005 worldwide.
[9] Georgiev represented Bulgaria U17 at the 2022 UEFA European Under-17 Championship where the team finished last in the group stage.