| ITF - M15 Héraklion | 11/01 10:00 | 44 | Neil Oberleitner v Theodorou, Eleftherios | Retired | |
| ITF - M15 Héraklion | 10/28 13:15 | 25 | Theodorou, Eleftherios v Dan Added | 3-6,5-7 | |
| ITF - M15 Héraklion | 02/26 10:45 | 25 | Buvaysar Gadamauri v Theodorou, Eleftherios | 6-0,6-1 | |
| ITF - M15 Héraklion | 02/19 08:25 | 25 | Geens, Clement v Theodorou, Eleftherios | 6-4,6-2 | |
| ITF - M15 Héraklion | 02/10 10:30 | 44 | Theodorou, Eleftherios v Ginat, Roi | 6-4,3-6,8-10 | |
| ITF - M15 Héraklion | 02/09 10:00 | 44 | Theodorou, Eleftherios v Daniil Savelev | 6-0,6-2 | |
| ITF - M15 Héraklion | 12/11 10:35 | 25 | Theodorou, Eleftherios v Sean Hodkin | 6-0,5-7,1-6 | |
| ITF - M15 Héraklion | 11/19 07:30 | 44 | Theodorou, Eleftherios v Sean Hodkin | 3-6,6-3,7-10 | |
| ITF - M15 Héraklion | 11/18 08:00 | 44 | Stefan Palosi v Theodorou, Eleftherios | 2-6,0-6 | |
| ITF - M15 Héraklion | 11/17 07:30 | 44 | Stamoulos, Ioannis v Theodorou, Eleftherios | 6-4,0-6,4-10 | |
| ITF - M15 Héraklion | 11/11 08:00 | 44 | Patrick Kypson v Theodorou, Eleftherios | 7-6,6-1 | |
| ITF - M15 Héraklion | 11/10 07:30 | 44 | Theodorou, Eleftherios v Barbu, Adrian | 6-4,6-2 | |
| ITF - M15 Héraklion | 11/07 07:30 | 26 | Geoffrey Blancaneaux v Theodorou, Eleftherios | 6-1,6-3 | |
| ITF Egypt F23 | 10/14 10:30 | 44 | Theodorou, Eleftherios v Makzoume, Yacoub | 6-3,3-6,3-6 | |
| ITF Egypt F23 | 10/13 10:30 | 44 | Bzarov, Alan v Theodorou, Eleftherios | 2-6,4-6 | |
| ITF Egypt F22 | 10/06 08:00 | 44 | Theodorou, Eleftherios v Omni Kumar | 3-6,2-6 | |
| ITF USA F24 Qual | 07/17 15:30 | 62 | Silverstein, Josh v Theodorou, Eleftherios | Retired | |
| ITF USA F24 Qual | 07/16 18:00 | 62 | Theodorou, Eleftherios v Bandres Jesus | 6-4,6-3 | |
| ITF USA F23 | 06/29 23:00 | 25 | Inoue, Haru v Theodorou, Eleftherios | 6-2,6-3 | |
| ITF USA F23 Qual | 06/26 14:30 | 62 | Theodorou, Eleftherios v Scott, Fletcher | 7-6,6-2 | |
| Coupe Davis | 07/18 10:40 | - | Theodorou, Eleftherios v Jotovski, Tomislav | 2-6,3-6 | |
| Coupe Davis | 07/17 11:20 | - | Petros Chrysochos v Theodorou, Eleftherios | 6-1,6-2 | |
| Coupe Davis | 07/16 10:10 | - | Theodorou, Eleftherios v de Rossi, Marco | 6-4,3-6,6-4 |