The 2023 Sofia Open was a men's tennis tournament to be played on indoor hard courts. It was the eighth edition of the event and it was part of the ATP 250 tournaments on the 2023 ATP Tour. It was played at the Arena Sofia in Sofia, Bulgaria, from 6 November to 11 November 2023. The tournament replaced the 2023 edition of the Tel Aviv Open, which was canceled due to the Gaza war.
The following players received wildcards into the main draw:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
The following pairs received wildcards into the doubles main draw:
The following pair received entry as alternates: