| ITF M15 Telavi | 10/27 06:00 | 27 | Jasza Szajrych v Filip C Jianu | 6-7,0-6 | |
| ITF M15 Telavi | 10/26 07:00 | 26 | Aleksandre Metreveli v Filip Cristian Jianu | 1-6,1-6 | |
| ITF M15 Telavi | 10/25 10:10 | 25 | Ivan Kazakov v Filip C Jianu | 4-6,3-6 | |
| ITF M25 Telavi | 10/20 08:25 | 27 | Filip C Jianu v Martin Krumich | 4-6,0-6 | |
| ITF M25 Telavi | 10/19 09:00 | 26 | Filip Cristian Jianu v Aleksandre Metreveli | 6-3,6-2 | |
| ITF M25 Telavi | 10/18 11:35 | 25 | Filip Cristian Jianu v Teymuraz Gabashvili | 6-2,6-4 | |
| ITF M15 Bad Waltersdorf | 10/04 11:35 | 25 | Filip Cristian Jianu v Matthias Ujvary | 2-6,6-3,0-6 | |
| ITF M15 Arad | 09/27 07:00 | 26 | Filip C Jianu v Matthew William Donald | 6-7,3-6 | |
| ITF M15 Arad | 09/26 11:15 | 25 | Filip C Jianu v Serafin Zund | 6-4,6-1 | |
| Challenger Sibiu | 09/20 10:35 | 25 | [341] Filip Cristian Jianu v Edoardo Lavagno [227] | 6-7,4-6 | |
| Challenger Sibiu | 09/18 07:00 | 19 | [356] Filip Cristian Jianu v Kai Wehnelt [159] | 6-0,7-5 | |
| Challenger Sibiu | 09/17 11:50 | 14 | Filip Cristian Jianu v Dragos Constantin Ignat | 6-1,6-4 | |
| ITF M15 Pirot | 09/10 09:00 | 29 | Filip Cristian Jianu v Vlad Andrei Dancu | 5-7,6-2,3-6 | |
| ITF M15 Pirot | 09/09 10:30 | 28 | Filip Cristian Jianu v Dusan Obradovic | 6-3,6-1 | |
| ITF M15 Pirot | 09/08 11:05 | 27 | Filip Cristian Jianu v Viktor Jovic | 6-3,6-3 | |
| ITF M15 Pirot | 09/07 11:25 | 26 | Filip Cristian Jianu v Vuk Radjenovic | 6-4,6-1 | |
| ITF M15 Pirot | 09/05 12:55 | 25 | Filip Cristian Jianu v Milan Drinic | 4-6,6-4,6-4 | |
| ITF M25 Maribor | 08/31 09:50 | 25 | Filip Cristian Jianu v Stefan Popovic | 5-7,4-6 | |
| Challenger Prague | 08/21 11:50 | 25 | [300] Lorenzo Giustino v Filip Cristian Jianu [348] | 6-4,6-3 | |
| ITF M25 Ystad | 08/18 10:00 | 27 | Marvin Moeller v Filip Cristian Jianu | 3-6,7-5,6-0 | |
| ITF M25 Ystad | 08/17 10:45 | 26 | John Sperle v Filip Cristian Jianu | 4-6,2-6 | |
| ITF M25 Ystad | 08/15 11:30 | 25 | Leonardo Catani v Filip Cristian Jianu | 2-6,0-6 | |
| Challenger Banja Luka | 08/08 08:30 | 25 | [302] Filip C Jianu v Norbert Gombos [229] | 6-7,2-6 | |
| ITF M25 Bacau | 07/29 08:00 | 28 | [372] Marius Copil v Filip Cristian Jianu [304] | 6-7,6-3,6-2 | |
| ITF M25 Bacau | 07/28 09:00 | 27 | Luca Giacomini v Filip Cristian Jianu | 7-6,4-6,3-6 | |
| ITF M25 Bacau | 07/27 09:25 | 26 | Lorenzo Joaquin Rodriguez v Filip Cristian Jianu | 1-6,6-7 | |
| ITF M25 Bacau | 07/26 11:30 | 25 | Razvan Baiant v Filip Cristian Jianu | 3-6,0-6 | |
| Challenger Tampere | 07/18 07:30 | 25 | [300] Filip Cristian Jianu v Dalibor Svrcina [193] | 6-3,3-6,3-6 | |
| Challenger Iasi | 07/12 16:00 | 26 | [312] Filip C Jianu v Kalin Ivanovski [370] | 6-3,4-6,3-6 | |
| Challenger Iasi | 07/10 16:10 | 25 | [158] Enzo Couacaud v Filip C Jianu [312] | 2-6,1-6 |
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.