| Challenger Antalya | 12/08 13:15 | 25 | Sarp Agabigun v Filip C Jianu | 0-6,5-7 | |
| Challenger Antalya | 12/03 07:00 | 27 | [305] Javier Barranco Cosano v Filip C Jianu [327] | 6-1,4-6,6-4 | |
| Challenger Antalya | 12/01 07:00 | 26 | [327] Filip C Jianu v Geoffrey Blancaneaux [281] | 6-7,6-4,6-0 | |
| Challenger Antalya | 11/30 10:45 | 25 | Mick Veldheer v Filip C Jianu | 1-6,4-6 | |
| Challenger Manama | 11/23 09:25 | 25 | [262] Nuno Borges v Filip C Jianu [333] | 6-3,7-6 | |
| ITF M15 Heraklion | 11/21 07:30 | 29 | [331] Filip C Jianu v Filip Bergevi [389] | 6-2,6-4 | |
| ITF M15 Heraklion | 11/20 11:15 | 28 | Filip C Jianu v Michael Zhu | 6-4,6-3 | |
| ITF M15 Heraklion | 11/19 09:35 | 27 | Filip C Jianu v Lukas Krainer | 6-2,5-7,6-2 | |
| ITF M15 Heraklion | 11/18 06:55 | 26 | Filip C Jianu v Kyle Seelig | 6-2,6-4 | |
| ITF M15 Heraklion | 11/17 09:05 | 25 | Filip C Jianu v Matthew Romios | 6-2,6-4 | |
| Challenger Roanne | 11/07 13:55 | 14 | Filip C Jianu v Gabriel Debru | 5-7,6-4,3-6 | |
| Challenger Tenerife | 11/02 12:55 | 25 | [281] Andrey Kuznetsov v Filip C Jianu [324] | 6-4,6-2 | |
| Challenger Tenerife | 11/01 11:55 | 19 | [324] Filip C Jianu v Yan Bondarevskiy [468] | 6-1,1-6,4-6 | |
| Challenger Tenerife | 10/31 11:55 | 14 | [326] Filip C Jianu v Lucas Gerch [444] | 6-3,6-1 | |
| Challenger Ismaning | 10/24 09:00 | 26 | [327] Filip C Jianu v Evan Furness [280] | 7-6,0-6,4-6 | |
| Challenger Losinj | 10/19 15:00 | 25 | [284] Geoffrey Blancaneaux v Filip C Jianu [327] | 6-2,6-3 | |
| Challenger Napoli | 10/11 10:50 | 19 | [302] Alexander Ritschard v Filip C Jianu [330] | 6-3,6-3 | |
| Challenger Napoli Qual | 10/10 14:00 | 14 | Alexander Weis v Filip C Jianu | 3-6,6-4,3-6 | |
| Challenger Sibiu | 09/28 09:05 | 25 | [177] Jiri Lehecka v Filip C Jianu [327] | 7-6,6-2 | |
| Challenger Bucharest | 09/21 10:00 | 25 | Dragos Nicolae Madaras v Filip Cristian Jianu | 6-4,6-3 | |
| Davis Cup | 09/19 13:00 | - | Filip C Jianu v Gastao Elias | Cancelled | |
| Davis Cup | 09/18 09:00 | - | [317] Filip C Jianu v Joao Sousa [150] | 3-6,5-7 | |
| Challenger Kyiv | 09/10 11:30 | 27 | [155] Sebastian Baez v Filip C Jianu [337] | 6-3,7-5 | |
| Challenger Kyiv | 09/09 08:00 | 26 | [337] Filip C Jianu v Riccardo Bonadio [307] | 7-6,3-6,6-4 | |
| Challenger Kyiv | 09/07 07:00 | 25 | Filip C Jianu v Richard Zusman | 6-4,6-1 | |
| Challenger Como | 08/29 12:55 | 14 | [315] Filippo Baldi v Filip C Jianu [334] | 6-4,6-4 | |
| Challenger Prague | 08/23 13:40 | 25 | [334] Filip C Jianu v Matheus P De Almeida [332] | 6-7,2-6 | |
| Challenger Luedenscheid | 08/19 11:15 | 26 | [139] Juan Manuel Cerundolo v Filip C Jianu [320] | 6-2,6-2 | |
| Challenger Luedenscheid | 08/17 14:35 | 25 | [320] Filip C Jianu v Rudolf Molleker [371] | 7-5,3-6,6-3 | |
| Challenger Luedenscheid | 08/17 09:00 | 19 | [361] Nick Hardt v Filip C Jianu [318] | 3-6,6-1,3-6 |
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.