| Challenger - Gwangju | 04/15 08:50 | 25 | [295] Alexander Blockx v Yunchaokete Bu [186] | Retired | |
| Challenger - Busan | 04/09 06:20 | 25 | [194] Coleman Wong v Alexander Blockx [297] | 6-3,6-3 | |
| ATP - Miami | 03/18 15:00 | 14 | [88] Pedro Martinez v Alexander Blockx [294] | 6-2,6-2 | |
| Challenger - Hamburg | 03/16 13:45 | 28 | [271] Henri Squire v Alexander Blockx [307] | 6-3,7-5 | |
| Challenger - Hamburg | 03/15 11:00 | 27 | [307] Alexander Blockx v Alexander Ritschard [198] | 7-5,6-2 | |
| Challenger - Hamburg | 03/13 11:55 | 26 | [175] Yunchaokete Bu v Alexander Blockx [307] | 6-3,2-6,1-6 | |
| Challenger - Hamburg | 03/11 17:30 | 25 | [258] Maks Kasnikowski v Alexander Blockx [307] | 4-6,6-7 | |
| Challenger - Lugano | 03/06 18:50 | 26 | [211] Gijs Brouwer v Alexander Blockx [307] | 6-3,6-1 | |
| Challenger - Lugano | 03/05 17:00 | 25 | [307] Alexander Blockx v Leandro Riedi [162] | 3-6,7-6,7-5 | |
| Challenger - Lille | 02/29 20:55 | 26 | [313] Alexander Blockx v Otto Virtanen [131] | 1-6,4-6 | |
| Challenger - Lille | 02/28 19:15 | 25 | [110] Benoit Paire v Alexander Blockx [313] | 4-6,7-5,3-6 | |
| Challenger Glasgow | 02/13 10:30 | 25 | [272] Manuel Guinard v Alexander Blockx [312] | Retired | |
| Challenger - Nottingham | 02/10 11:00 | 28 | [338] Alexander Blockx v Giovanni M Perricard [198] | 6-7,2-6 | |
| Challenger - Nottingham | 02/09 11:00 | 27 | [338] Alexander Blockx v Abdullah Shelbayh [188] | 7-6,6-3 | |
| Challenger - Nottingham | 02/07 14:55 | 26 | [183] Alexander Ritschard v Alexander Blockx [338] | 6-7,6-3,4-6 | |
| Challenger - Nottingham | 02/05 15:15 | 25 | [258] Valentin Royer v Alexander Blockx [338] | 7-6,3-6,6-7 | |
| Challenger - Koblenz | 01/31 14:40 | 26 | [350] Alexander Blockx v Rudolf Molleker [191] | 3-6,0-6 | |
| Challenger - Koblenz | 01/29 13:30 | 25 | [350] Alexander Blockx v Giovanni Mpetshi Perricard [196] | 3-6,6-3,7-6 | |
| Challenger - Ottignies | 01/24 18:00 | 25 | [271] Henri Squire v Alexander Blockx [350] | 3-6,6-4,7-6 | |
| Challenger - Ottignies | 01/24 18:00 | 25 | Hamad Medjedovic v Alexander Blockx | Cancelled | |
| Australian Open | 01/09 23:00 | 14 | [351] Alexander Blockx v Zachary Svajda [141] | 6-4,3-6,4-6 | |
| Challenger - Canberra | 12/31 03:35 | 45 | [187] Daniel Rincon v Alexander Blockx [349] | 6-3,6-3 | |
| Challenger - Danderyd | 11/18 14:00 | 28 | [412] Alexander Blockx v Brandon Nakashima [143] | 1-6,2-6 | |
| Challenger - Danderyd | 11/17 15:40 | 27 | [412] Alexander Blockx v Jakub Mensik [152] | 6-3,6-0 | |
| Challenger - Danderyd | 11/16 14:50 | 26 | [133] Corentin Moutet v Alexander Blockx [412] | 6-7,1-6 | |
| Challenger - Danderyd | 11/15 11:00 | 25 | [412] Alexander Blockx v Maximilian Neuchrist [247] | 3-6,6-1,7-6 | |
| Challenger - Danderyd | 11/13 12:00 | 19 | [204] Billy Harris v Alexander Blockx [412] | 6-7,7-6,4-6 | |
| Challenger - Danderyd | 11/12 12:20 | 14 | Andrea Guerrieri v Alexander Blockx | 5-7,5-7 | |
| ITF M25 - Sunderland | 11/05 10:25 | 29 | Alexander Blockx v Tibo Colson | 4-6,6-2,6-4 | |
| ITF M25 - Sunderland | 11/04 11:45 | 28 | Alexander Blockx v Hamish Stewart | 7-5,6-3 |