Christian Carlos Miniussi Ventureira (born 5 July 1967) is a former tennis player from Argentina. He won one career title in singles (in 1991 São Paulo, as a lucky loser) and reached his highest singles ATP ranking on 18 May 1992 of No. 57 in the world.
Miniussi turned professional in 1984. He started playing tennis at the Adrogué Tennis Club and he also represented his native country as a lucky loser at the 1992 Summer Olympics in Barcelona, where he was defeated in the first round by France's Fabrice Santoro. In the doubles competition Miniussi claimed the bronze medal alongside Javier Frana.