Filip Cristian Jianu (born 18 September 2001) is a Romanian tennis player.

He has a career high ATP singles ranking of world No.

[1] Jianu represents Romania at the Davis Cup.

[2] In November 2024, he reached his second singles final for the season at the 2024 Brazzaville Challenger, where he lost to Gonzalo Oliveira.

[3][4] This biographical article relating to Romanian tennis is a stub.