| Challenger Gwangju | 04/18 04:40 | 26 | [268] Philip Sekulic v Mark Lajal [208] | 6-7,4-6 | |
| Challenger Gwangju | 04/16 02:00 | 25 | [180] Mattia Bellucci v Philip Sekulic [268] | 6-0,1-6,5-7 | |
| Challenger Busan | 04/10 02:00 | 26 | [183] Lloyd Harris v Philip Sekulic [275] | 6-4,7-6 | |
| Challenger Busan | 04/08 04:30 | 25 | [269] Philip Sekulic v Jisung Nam [138] | 6-1,6-4 | |
| Challenger Asuncion | 03/19 19:00 | 25 | [266] Gianluca Mager v Philip Sekulic [267] | 6-3,6-1 | |
| Challenger Santiago | 03/11 20:55 | 25 | [303] Liam Draxl v Philip Sekulic [263] | 6-7,6-4,7-6 | |
| Challenger Santa Cruz | 03/05 18:30 | 25 | [263] Philip Sekulic v Francisco Comesana [114] | 7-6,3-6,1-6 | |
| Challenger New Delhi | 03/01 09:55 | 27 | [265] Philip Sekulic v Geoffrey Blancaneaux [277] | 6-7,2-6 | |
| Challenger New Delhi | 02/29 07:20 | 26 | [274] Evgeny Donskoy v Philip Sekulic [265] | 3-6,2-6 | |
| Challenger New Delhi | 02/27 13:00 | 25 | [265] Philip Sekulic v Tung-Lin Wu [236] | 6-3,6-3 | |
| Challenger New Delhi | 02/26 04:30 | 19 | [271] Philip Sekulic v Yusuke Takahashi [403] | 6-1,7-5 | |
| Challenger New Delhi | 02/25 06:05 | 14 | [271] Philip Sekulic v Vadym Ursu [429] | 6-3,6-2 | |
| Challenger Pune | 02/19 10:40 | 25 | [271] Philip Sekulic v Dalibor Svrcina [174] | 4-6,3-6 | |
| Challenger Bengaluru | 02/13 07:25 | 25 | [126] Benjamin Bonzi v Philip Sekulic [271] | 6-3,6-2 | |
| Challenger Burnie | 02/09 01:00 | 27 | [180] Adam Walton v Philip Sekulic [280] | 6-2,1-6,7-6 | |
| Challenger Burnie | 02/07 00:20 | 26 | [350] Hiroki Moriya v Philip Sekulic [280] | 4-6,3-6 | |
| Challenger Burnie | 02/05 03:45 | 25 | [417] Maxime Chazal v Philip Sekulic [273] | 3-6,4-6 | |
| Challenger Burnie | 01/31 23:00 | 26 | Shintaro Imai v Philip Sekulic | 6-7,7-5,6-3 | |
| Challenger Burnie | 01/30 00:35 | 25 | [387] Blake Ellis v Philip Sekulic [273] | 3-6,4-6 | |
| Australian Open | 01/09 23:00 | 14 | [275] Philip Sekulic v Oriol Roca Batalla [212] | 5-7,1-6 | |
| ATP Brisbane | 12/30 08:40 | 14 | [277] Philip Sekulic v James Duckworth [116] | 6-7,4-6 | |
| Challenger Kobe | 11/12 06:10 | 14 | [273] Philip Sekulic v Yusuke Takahashi [467] | Retired | |
| Challenger Sydney | 11/02 01:45 | 26 | [67] Thanasi Kokkinakis v Philip Sekulic [282] | 7-5,7-5 | |
| Challenger Sydney | 10/31 02:20 | 25 | [467] Ajeet Rai v Philip Sekulic [282] | 2-6,6-7 | |
| Challenger Playford | 10/26 01:30 | 26 | [286] Philip Sekulic v James Duckworth [125] | 5-7,1-6 | |
| Challenger Playford | 10/24 01:10 | 25 | [397] Blake Ellis v Philip Sekulic [286] | 3-6,5-7 | |
| ATP Tokyo | 10/14 04:40 | 14 | [298] Philip Sekulic v Cristian Garin [98] | 6-7,3-6 | |
| Challenger Shenzhen | 10/11 02:00 | 25 | [146] Aleksandar Kovacevic v Philip Sekulic [298] | 6-1,6-4 | |
| ATP Shanghai | 10/05 04:30 | 23 | [298] Philip Sekulic v Lorenzo Sonego [59] | 3-6,2-6 | |
| ATP Shanghai | 10/03 10:05 | 15 | [311] Arthur Weber v Philip Sekulic [292] | 4-6,3-6 |