| ATP Antwerp Qual | 10/15 14:20 | 26 | [151] Mathias Bourgue v Arthur De Greef [146] | 7-6,6-3 | |
| Challenger Almaty | 10/05 10:00 | 27 | [98] Laslo Djere v Arthur De Greef [147] | 6-3,6-3 | |
| Challenger Almaty | 10/05 07:25 | 26 | [272] Timur Khabibulin v Arthur De Greef [147] | 1-6,3-6 | |
| Challenger Almaty | 10/02 04:00 | 25 | [269] Tomislav Brkic v Arthur De Greef [148] | 4-6,3-6 | |
| Challenger Rome 2 | 09/25 10:50 | 25 | [148] Arthur De Greef v Pedro Sousa [102] | 1-6,4-6 | |
| Challenger Alphen | 09/06 11:20 | 25 | [338] Julien Cagnina v Arthur De Greef [143] | Retired | |
| Challenger Manerbio | 08/24 13:15 | 26 | [142] Arthur De Greef v Carlos Taberner [282] | 6-7,6-3,1-6 | |
| Challenger Manerbio | 08/22 10:40 | 25 | [142] Arthur De Greef v Federico Gaio [309] | 6-3,6-4 | |
| Challenger Meerbusch | 08/15 14:00 | 25 | [226] Ricardo Ojeda Lara v Arthur De Greef [144] | 7-6,6-4 | |
| ATP Gstaad Qual | 07/22 08:30 | 45 | [115] Arthur De Greef v Adrian Bodmer [451] | 6-7,2-6 | |
| ATP Bastad | 07/18 13:05 | 25 | [348] Ernests Gulbis v Arthur De Greef [115] | 4-6,6-3,6-2 | |
| ATP Bastad Qual | 07/17 10:45 | 46 | [115] Arthur De Greef v Tommy Robredo [180] | 6-4,6-2 | |
| ATP Bastad Qual | 07/16 08:00 | 45 | [116] Arthur De Greef v Fred Simonsson [221] | 4-6,6-4,6-4 | |
| Challenger Bastad | 07/12 16:00 | 26 | [269] Elias Ymer v Arthur De Greef [116] | 6-3,6-1 | |
| Challenger Bastad | 07/11 11:15 | 25 | [308] Hubert Hurkacz v Arthur De Greef [116] | 6-4,3-6,3-6 | |
| Challenger Marburg | 07/07 13:35 | 28 | [167] Cedrik-Marcel Stebe v Arthur De Greef [116] | 6-4,6-4 | |
| Challenger Marburg | 07/06 10:00 | 27 | [116] Arthur De Greef v Benjamin Bonzi [219] | 6-2,7-5 | |
| Challenger Marburg | 07/05 10:00 | 26 | [116] Arthur De Greef v Maximo Gonzalez [169] | 7-5,7-5 | |
| Challenger Marburg | 07/03 12:50 | 25 | Arthur De Greef v Benjamin Hassan | 7-5,6-3 | |
| Challenger Milan | 06/27 12:10 | 25 | [274] Andrea Collarini v Arthur De Greef [115] | Retired | |
| Challenger Todi | 06/23 15:00 | 27 | [113] Arthur De Greef v Marco Cecchinato [97] | 5-7,3-6 | |
| Challenger Todi | 06/21 13:00 | 26 | [113] Arthur De Greef v Jozef Kovalik [162] | 6-2,6-3 | |
| Challenger Todi | 06/19 14:10 | 25 | [113] Arthur De Greef v Miljan Zekic [227] | 6-2,6-4 | |
| Challenger Lyon | 06/14 08:30 | 26 | [383] Maxime Chazal v Arthur De Greef [117] | 4-6,6-2,6-1 | |
| Challenger Lyon | 06/13 11:00 | 25 | [262] Jaume Munar v Arthur De Greef [117] | Retired | |
| French Open | 05/29 15:40 | 23 | [25] Richard Gasquet v Arthur De Greef [127] | 6-2,3-6,6-1,6-3 | |
| French Open Qual | 05/26 08:00 | 46 | [215] Daniel Masur v Arthur De Greef [127] | 3-6,4-6 | |
| French Open Qual | 05/24 15:40 | 45 | [160] Maximo Gonzalez v Arthur De Greef [127] | 6-3,0-6,6-7 | |
| French Open Qual | 05/23 08:00 | 44 | [216] Enrique Lopez-Perez v Arthur De Greef [127] | 6-7,0-6 | |
| Challenger Bordeaux | 05/20 13:45 | 28 | [50] Steve Darcis v Arthur De Greef [138] | 5-7,6-1,7-6 |