Inter are in Razgrad for the first-leg of the round of 32 on Thursday.
Conte said, “We are talking about a team that is accustomed to European competition. They have a large lead over the second-placed side in Bulgaria, so we must face this game with the right humility, mentality and determination to do our best.
“Ludogorets are in good shape, they won their last league game 6-0, so we need to be on our toes," said the coach in his press conference.
“I don't like to talk about individual players, as Ludogorets are a collective with a lot of quality all the way through and we need to show great respect.
“We worked on their strengths and also what could be their weaknesses."