| Challenger Poprad Tatry | 06/23 12:30 | 29 | [150] Jozef Kovalik v Arthur De Greef [295] | 6-4,6-0 | |
| Challenger Poprad Tatry | 06/22 12:00 | 28 | [206] Attila Balazs v Arthur De Greef [295] | 1-6,3-6 | |
| Challenger Poprad Tatry | 06/21 11:40 | 27 | [295] Arthur De Greef v Sergio G Ferrol [238] | 6-2,7-5 | |
| Challenger Poprad Tatry | 06/20 13:35 | 26 | [295] Arthur De Greef v Filip Horansky [302] | 7-6,6-3 | |
| Challenger Poprad Tatry | 06/18 13:25 | 25 | [212] Uladzimir Ignatik v Arthur De Greef [295] | 2-6,6-3,3-6 | |
| Challenger Shymkent | 06/04 09:10 | 25 | [249] Arthur De Greef v Sebastian Ofner [147] | Retired | |
| Challenger Mestre | 05/23 16:05 | 25 | [250] Arthur De Greef v Andrea Arnaboldi [270] | 4-6,6-4,3-6 | |
| Challenger Bordeaux | 05/15 08:00 | 25 | [241] Gregoire Barrere v Arthur De Greef [222] | 6-1,6-2 | |
| Challenger Ostrava | 05/06 12:00 | 29 | [241] Nino Serdarusic v Arthur De Greef [289] | 6-4,4-6,2-6 | |
| Challenger Ostrava | 05/05 13:40 | 28 | [256] Matteo Donati v Arthur De Greef [289] | 6-7,4-6 | |
| Challenger Ostrava | 05/04 14:00 | 27 | [237] Zdenek Kolar v Arthur De Greef [289] | 6-7,6-7 | |
| Challenger Ostrava | 05/03 10:00 | 26 | [231] Pedro Martinez v Arthur De Greef [289] | 6-7,2-6 | |
| Challenger Ostrava | 05/01 14:00 | 25 | [289] Arthur De Greef v Sergiy Stakhovsky [126] | 6-4,3-6,6-3 | |
| Challenger Francavilla | 04/23 10:15 | 25 | [205] Casper Ruud v Arthur De Greef [288] | 7-5,2-6,6-1 | |
| Challenger Barletta Qual | 04/08 11:05 | 46 | [260] Arthur De Greef v Maxime Chazal [445] | 3-6,7-6,5-7 | |
| Challenger Barletta Qual | 04/07 12:35 | 45 | [260] Arthur De Greef v Andrea Vavassori [162] | 6-1,6-2 | |
| Challenger Alicante Qual | 04/01 08:30 | 46 | [255] Arthur De Greef v Federico Gaio [314] | 6-7,1-6 | |
| Challenger Alicante Qual | 03/31 08:30 | 45 | Arthur De Greef v Marc Giner | Retired | |
| Challenger Marbella Qual | 03/26 09:00 | 54 | [278] Kimmer Coppejans v Arthur De Greef [255] | 4-6,6-1,6-4 | |
| Challenger Marbella Qual | 03/25 11:30 | 46 | [387] Eduard Esteve Lobato v Arthur De Greef [255] | 4-6,3-6 | |
| Challenger Marbella Qual | 03/24 15:00 | 45 | Alberto R D A Senise v Arthur De Greef | 2-6,4-6 | |
| Challenger Santiago | 03/05 16:30 | 25 | Pedja Krstin v Arthur De Greef | 6-3,3-6,6-0 | |
| Challenger Punta del Este | 02/27 16:30 | 25 | Arthur De Greef v Juan Ignacio Londero | Retired | |
| Challenger Budapest | 02/08 11:00 | 26 | Arthur De Greef v Jurgen Zopp | 3-6,6-7 | |
| Challenger Budapest | 02/06 12:20 | 25 | Arthur De Greef v Jeremy Jahn | 6-1,6-3 | |
| Challenger Quimper | 01/30 19:05 | 25 | Arthur De Greef v Vincent Millot | 2-6,4-6 | |
| Challenger Rennes | 01/23 15:30 | 25 | Arthur De Greef v Antoine Hoang | 6-7,6-3,3-6 | |
| Australian Open Qual | 01/10 04:50 | 44 | Arthur De Greef v Mathias Bourgue | 6-3,3-6,4-6 | |
| Challenger Playford | 01/02 07:45 | 25 | Arthur De Greef v Alex Bolt | 3-6,4-6 | |
| Challenger Brest | 10/24 16:30 | 25 | [187] Benjamin Bonzi v Arthur De Greef [151] | 4-6,7-5,6-3 |