Poor keeping to blame for draw in Sofia.
Liverpool were left frustrated as they failed to keep hold of their lead over Bulgarian opposition.
Dani Abalo gave the home side an early lead after Liverpool keeper Simon Mignolet failed to keep hold of a long range effort, parrying directly to the opposition.
Veteran forward Rickie Lambert soon leveled though as he made the most of some shocking Ludogorets defending.
Liverpool began to take control of the game and deservedly took the lead when Raheem Sterling found Jordan Henderson with a sweet pass and the midfielder fired home.
However Liverpool were unable to keep hold of all three points as Mignolet, and his defence, failed to deal with a corner and conceded a late equalizer.