A youth product of CSKA Sofia, Antov became the youngest player ever to represent the club when he made his debut in 2015 at the age of 14 years, 9 months and 10 days.

On 19 August 2015, Antov made his first team debut in a Bulgarian Cup match against Sofia 2010, becoming CSKA's youngest ever debutant at the age of 14 years, 9 months and 10 days, while also becoming the youngest ever captain for the club after taking the captain's armband for the last 25 minutes of the match.

[citation needed] On 12 July 2018, Antov made his debut in the Europa League playing 90 minutes in the first match of the first qualifying round against Latvian club Riga.

[4] On 1 February 2021, Antov was loaned to Serie A club Bologna until the end of the season with an option for a permanent transfer.

[10] On 25 March 2019, Antov debuted for the Bulgarian senior squad as an 80th-minute substitute for Georgi Kostadinov in a Euro 2020 qualifier against Kosovo.