| Challenger Bratislava | 06/05 11:40 | 14 | [300] Filip C Jianu v Filip Peliwo [438] | 6-7,6-2,6-4 | |
| Challenger Prostejov | 05/29 08:00 | 14 | Filip C Jianu v Giovanni M Perricard | 3-6,4-6 | |
| Challenger Shymkent | 05/18 07:10 | 26 | [300] Filip C Jianu v Robin Haase [324] | 3-6,6-3,3-6 | |
| Challenger Shymkent | 05/16 10:35 | 25 | Filip C Jianu v Dostanbek Tashbulatov | 6-2,6-2 | |
| Challenger Shymkent | 05/10 09:30 | 25 | [295] Filip C Jianu v Sebastian Fanselow [397] | 3-6,5-7 | |
| Challenger Morelos | 04/26 16:00 | 25 | [292] Nicolas Mejia v Filip C Jianu [298] | 6-4,6-3 | |
| Challenger Aguascalientes | 04/23 21:55 | 28 | [305] Filip C Jianu v Marc-Andrea Huesler [144] | 3-6,6-7 | |
| Challenger Aguascalientes | 04/22 17:30 | 27 | [453] Adrian Menendez-Maceiras v Filip C Jianu [305] | 4-6,3-6 | |
| Challenger Aguascalientes | 04/20 16:00 | 26 | [374] Nicolas Barrientos v Filip C Jianu [305] | 5-7,2-6 | |
| Challenger Aguascalientes | 04/18 20:35 | 25 | [305] Filip C Jianu v Tim Van Rijthoven [183] | 6-3,6-4 | |
| Challenger San Luis Potosi | 04/12 19:45 | 25 | [308] Filip C Jianu v Antoine Bellier [488] | 3-6,6-3,5-7 | |
| Challenger Oeiras | 04/05 10:50 | 25 | [386] Lucas Gerch v Filip C Jianu [308] | 6-3,6-4 | |
| ITF M15 Antalya | 03/23 06:50 | 25 | Filip C Jianu v Daniel Siniakov | Retired | |
| Challenger Roseto Qual | 03/13 13:50 | 14 | [287] Filip C Jianu v Alexis Gautier [361] | 3-6,4-6 | |
| Challenger Turin | 03/04 10:00 | 27 | [308] Filip C Jianu v Mats Moraing [150] | 4-6,3-6 | |
| Challenger Turin | 03/03 10:00 | 26 | [182] Tim Van Rijthoven v Filip C Jianu [308] | 7-6,6-7,2-6 | |
| Challenger Turin | 03/01 12:25 | 25 | [280] Luca Nardi v Filip C Jianu [308] | 2-6,6-7 | |
| Challenger Turin | 02/28 09:00 | - | [308] Filip C Jianu v Mats Rosenkranz [398] | 6-3,7-6 | |
| Challenger Turin | 02/27 09:00 | 45 | [310] Filip C Jianu v Jonathan Eysseric [206] | 6-4,3-6,6-1 | |
| Challenger Forli | 02/21 09:00 | 19 | [271] Michael Mmoh v Filip C Jianu [310] | 6-2,7-5 | |
| Challenger Forli Qual | 02/20 08:30 | 14 | [123] Evan King v Filip C Jianu [313] | 2-6,1-6 | |
| ITF M15 Monastir | 02/16 08:30 | 25 | Filip C Jianu v Jerome Kym | 3-6,6-7 | |
| Challenger Cherbourg | 02/06 09:00 | 14 | [408] Mats Rosenkranz v Filip C Jianu [314] | 6-4,7-5 | |
| Challenger Quimper | 01/24 12:20 | 19 | [258] Tim Van Rijthoven v Filip C Jianu [318] | 6-4,6-4 | |
| Challenger Quimper | 01/23 13:55 | 14 | [490] Antoine Bellier v Filip C Jianu [318] | 4-6,4-6 | |
| ITF M25 Monastir | 01/18 09:15 | 25 | Filip C Jianu v Gleb Sakharov | 6-7,6-4,3-6 | |
| ITF M25 Monastir | 01/12 11:30 | 25 | Filip C Jianu v Aziz Ouakaa | 6-7,4-6 | |
| Challenger Maia | 12/16 12:55 | 26 | [318] Filip C Jianu v Eduard Esteve Lobato [326] | 7-5,3-6,4-6 | |
| Challenger Maia | 12/14 11:00 | 25 | [221] Maxime Janvier v Filip C Jianu [318] | 6-7,2-6 | |
| Challenger Antalya | 12/09 08:20 | 26 | [144] Cem Ilkel v Filip C Jianu [318] | 6-7,6-4,6-0 |
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.