| ITF Romania F8 | 08/07 08:20 | 25 | Teodor-Dacian Craciun v Filip C Jianu | Retired | |
| ITF Romania F2 | 06/01 08:00 | 27 | Filip C Jianu v Gonzalo Escobar | 7-6,0-6,4-6 | |
| ITF Romania F2 | 05/31 07:00 | 26 | Marko Tepavac v Filip C Jianu | 0-6,3-6 | |
| ITF Romania F2 | 05/29 08:05 | 25 | Filip C Jianu v Tigre Hank | 6-2,6-3 | |
| ITF Romania F10 | 08/17 08:55 | 26 | Filip C Jianu v Maxime Tabatruong | 3-6,5-7 | |
| ITF Romania F10 | 08/16 11:55 | 25 | Andrei Stefan Apostol v Filip Cristian Jianu | 4-6,5-7 | |
| ITF Romania F10 | 08/14 07:00 | 62 | Filip Cristian Jianu v Razvan M Codescu | 6-1,6-1 | |
| ITF Romania F10 | 08/13 06:00 | 62 | Filip Cristian Jianu v Milen Ianakiev | 6-2,4-6,6-4 | |
| ITF Romania F10 | 08/12 10:00 | 62 | Filip Cristian Jianu v Alessio Giannuzzi | 6-4,6-2 | |
| ITF Romania F5 | 06/30 07:00 | 27 | Vasile Antonescu v Filip C Jianu | 6-2,6-4 | |
| ITF Romania F5 | 06/29 08:00 | 26 | Filip C Jianu v Claudio Fortuna | 6-1,7-6 | |
| ITF Romania F5 | 06/27 07:00 | 25 | Nicolo Turchetti v Filip Cristian Jianu | 6-2,2-6,4-6 | |
| ITF Czech Republic F2 | 05/23 10:20 | 25 | Filip C Jianu v Alexander Vasilenko | 0-6,2-6 | |
| ITF USA F9 | 02/27 16:00 | 60 | Filip Cristian Jianu v Hunter Callahan | 0-6,2-6 | |
| ITF USA F9 | 02/26 16:00 | 60 | Luca Gelhardt v Filip Cristian Jianu | 3-6,6-0,1-6 | |
| ITF USA F9 | 02/25 15:00 | 60 | Brian Shi v Filip Cristian Jianu | Retired | |
| ITF Romania F13 | 08/16 09:05 | 25 | Vasile Antonescu v Filip Cristian Jianu | 6-1,6-3 |
Filip Cristian Jianu (born 18 September 2001) is a Romanian tennis player.
Jianu has a career high ATP singles ranking of No. 264 achieved on 16 January 2023 and a doubles ranking of No. 451 achieved on 10 April 2023. He is currently the No. 1 Romanian player.
Jianu has a career high ITF junior ranking of No. 5 achieved on 4 February 2019.
Jianu represents Romania at the Davis Cup.