Filip Cristian Jianu (born 18 September 2001) is a Romanian professional tennis player. He has a career-high ATP singles ranking of No. 210, achieved on 9 June 2025 and a best doubles ranking of No. 451, reached on 10 April 2023. He is currently the No. 1 singles player from Romania.
Jianu represents Romania at the Davis Cup.
Jianu had good results as a junior player. He reached an ITF junior combined ranking of world No. 5 on 4 February 2019.
In November 2024, Jianu reached his second singles final for the season at the 2024 Brazzaville Challenger, where he lost to Gonzalo Oliveira.
In March 2025, Jianu received a wildcard for his home tournament, the 2025 ÃÂiriac Open, and recorded his first ATP Tour win (outside of the Davis Cup) over Nishesh Basavareddy in straight sets. He lost to Damir Dà ¾umhur in three sets.