| ITF M25 Hammamet | 02/15 12:50 | 26 | Filip C Jianu v Peter Benjamin Privara | 6-2,5-7,6-3 | |
| ITF M25 Hammamet | 02/13 11:35 | 25 | Filip C Jianu v Samir Hamza Reguig | 7-5,6-3 | |
| ITF M25 Hammamet | 02/10 10:30 | 28 | Filip Cristian Jianu v Kamil Majchrzak | 5-7,4-6 | |
| ITF M25 Hammamet | 02/09 11:50 | 27 | Daniel Bagnolini v Filip Cristian Jianu | 0-6,1-6 | |
| ITF M25 Hammamet | 02/08 11:00 | 26 | Max Alcala Gurri v Filip Cristian Jianu | 6-0,2-6,4-6 | |
| ITF M25 Hammamet | 02/07 08:30 | 25 | Omar Brigida v Filip Cristian Jianu | 1-6,1-6 | |
| ITF M25 Hammamet | 01/31 08:30 | 25 | Filip C Jianu v Noah Perfetti | 1-6,4-6 | |
| ITF M15 Antalya | 01/22 07:20 | 29 | Carlos Gimeno Valero v Filip Cristian Jianu | 6-3,6-4 | |
| ITF M15 Antalya | 01/20 07:30 | 28 | [418] Filip Cristian Jianu v Cezar Cretu [364] | 6-2,7-6 | |
| ITF M15 Antalya | 01/20 07:00 | 26 | Ilya Snitari v Filip Cristian Jianu | Cancelled | |
| ITF M15 Antalya | 01/19 07:30 | 27 | Federico Arnaboldi v Filip Cristian Jianu | 7-5,2-6,6-7 | |
| ITF M15 Antalya | 01/18 07:00 | 26 | Gabriel Donev v Filip Cristian Jianu | 2-6,4-6 | |
| ITF M15 Antalya | 01/17 11:55 | 25 | Dinko Dinev v Filip Cristian Jianu | 0-6,4-6 | |
| ITF M15 Antalya | 01/14 08:00 | 29 | Filip Cristian Jianu v Peter Heller | 7-6,6-4 | |
| ITF M15 Antalya | 01/13 10:20 | 28 | Filip Cristian Jianu v Niccolo Catini | 6-4,6-2 | |
| ITF M15 Antalya | 01/12 09:30 | 27 | Filip Cristian Jianu v Gokberk Saritas | 6-2,6-4 | |
| ITF M15 Antalya | 01/12 07:00 | 26 | Filip Cristian Jianu v Maximilian Figl | 6-2,6-0 | |
| ITF M15 Antalya | 01/11 09:30 | 25 | Filip Cristian Jianu v Lucas Bouquet | 6-1,6-3 | |
| ITF M15 Antalya | 12/09 08:00 | 27 | Filip Cristian Jianu v Dmitry Popko | 4-6,5-7 | |
| ITF M15 Antalya | 12/08 11:15 | 26 | Filip Cristian Jianu v Louroi Martinez | 6-0,3-6,10-8 | |
| ITF M15 Antalya | 12/05 09:35 | 25 | Filip Cristian Jianu v Stefan Palosi | 6-2,7-5 | |
| Challenger Maia | 11/28 15:20 | 25 | [257] Joao Sousa v Filip C Jianu [329] | 6-3,3-6,6-1 | |
| ITF M25 Antalya | 11/15 09:10 | 25 | Calin Manda v Filip Cristian Jianu | Retired | |
| ITF M15 Antalya | 11/12 07:30 | 29 | Gabriele Pennaforti v Filip Cristian Jianu | 3-6,2-6 | |
| ITF M15 Antalya | 11/11 07:30 | 28 | [455] Tim Handel v Filip Cristian Jianu [340] | 3-6,3-6 | |
| ITF M15 Antalya | 11/10 07:00 | 27 | Dan Alexandru Tomescu v Filip Cristian Jianu | 0-6,7-5,3-6 | |
| ITF M15 Antalya | 11/09 09:45 | 26 | [475] Ilya Snitari v Filip Cristian Jianu [340] | 2-6,4-6 | |
| ITF M15 Antalya | 11/08 06:55 | 25 | Vlad Andrei Dumitru v Filip Cristian Jianu | 1-6,2-6 | |
| ITF M15 Telavi | 10/29 06:30 | 29 | Svyatoslav Gulin v Filip C Jianu | 2-6,0-6 | |
| ITF M15 Telavi | 10/28 08:00 | 28 | Vlad Andrei Dancu v Filip C Jianu | 2-6,7-6,3-6 |
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.