Dejan kept his personal life relatively private, but he was married to his wife Natasa. Dejan was a former Serbian basketball star who played 14 years in his home country as well as in Spain, Montenegro, and Turkey. He was named the MVP of the Adriatic League during three consecutive seasons, and entered coaching after he had retired from his career as a player. He started out as a coach in Europe, and even worked with Nikola Jokic before he joined the NBA.