| Challenger Brest | 10/25 10:35 | 25 | Alexey Vatutin v Alessandro Giannessi | 6-4,2-6,1-6 | |
| ATP Sztokholm | 10/17 10:00 | 25 | [84] Jeremy Chardy v Alessandro Giannessi [139] | 6-0,7-5 | |
| ATP Beijing Qual | 09/30 07:00 | 45 | [131] Alessandro Giannessi v Dusan Lajovic [84] | 3-6,6-3,3-6 | |
| ATP Shenzhen | 09/25 06:00 | 25 | [132] Alessandro Giannessi v Jeremy Chardy [83] | 6-7,4-6 | |
| ATP Metz | 09/18 13:55 | 25 | [132] Alessandro Giannessi v Marius Copil [86] | 3-6,2-6 | |
| Challenger Szczecin | 09/12 10:30 | 25 | [493] Artem Smirnov v Alessandro Giannessi [93] | 7-6,6-1 | |
| Challenger Genova | 09/07 12:25 | 26 | [123] Guillermo Garcia-Lopez v Alessandro Giannessi [91] | 6-4,7-5 | |
| Challenger Genova | 09/06 08:30 | 25 | [264] Julian Ocleppo v Alessandro Giannessi [91] | 5-7,1-6 | |
| US Open | 08/28 16:55 | 23 | [91] Alessandro Giannessi v Ernests Gulbis [255] | 4-6,7-6,2-6,5-7 | |
| ATP Kitzbuhel Qual | 07/29 11:30 | 45 | Alessandro Giannessi v Miljan Zekic | 6-3,5-7,4-6 | |
| Challenger Cortina | 07/25 15:30 | 25 | Alessandro Giannessi v Pedro Martinez | 7-5,4-6,4-6 | |
| ATP Umag | 07/22 18:00 | 28 | [34] Paolo Lorenzi v Alessandro Giannessi [104] | 6-2,4-6,6-3 | |
| ATP Umag | 07/21 16:00 | 27 | [104] Alessandro Giannessi v Rogerio Dutra Silva [64] | 6-7,6-2,7-5 | |
| ATP Umag | 07/20 18:45 | 26 | [148] Kenny de Schepper v Alessandro Giannessi [104] | 2-6,6-3,3-6 | |
| ATP Umag | 07/18 15:00 | 25 | [207] Marc Polmans v Alessandro Giannessi [104] | 7-6,3-6,4-6 | |
| Challenger Perugia | 07/13 11:40 | 26 | [200] Salvatore Caruso v Alessandro Giannessi [103] | 6-3,6-3 | |
| Challenger Perugia | 07/12 16:25 | 25 | [155] Stefano Travaglia v Alessandro Giannessi [103] | 3-6,6-4,5-7 | |
| Wimbledon Qual | 06/26 17:10 | 44 | [100] Alessandro Giannessi v Pedro Sousa [153] | 6-4,3-6,4-6 | |
| Challenger Todi | 06/20 16:15 | 25 | [99] Alessandro Giannessi v Laurynas Grigelis [251] | Retired | |
| Challenger Caltanissetta | 06/18 16:30 | 29 | [36] Paolo Lorenzi v Alessandro Giannessi [118] | 6-4,6-2 | |
| Challenger Caltanissetta | 06/17 15:15 | 28 | [118] Alessandro Giannessi v Cedrik-Marcel Stebe [258] | 6-3,7-6 | |
| Challenger Caltanissetta | 06/16 14:30 | 27 | [118] Alessandro Giannessi v Mikhail Kukushkin [126] | 6-4,1-6,6-1 | |
| Challenger Caltanissetta | 06/15 19:20 | 26 | [118] Alessandro Giannessi v Inigo Cervantes [177] | 6-2,6-3 | |
| Challenger Caltanissetta | 06/13 12:15 | 25 | [118] Alessandro Giannessi v Enrique Lopez-Perez [236] | 7-5,7-5 | |
| Challenger Vicenza | 05/30 16:25 | 25 | [206] Filip Krajinovic v Alessandro Giannessi [109] | 6-3,3-6,6-3 | |
| French Open Qual | 05/24 15:55 | 45 | [108] Alessandro Giannessi v Matteo Donati [226] | 3-6,6-3,6-7 | |
| French Open Qual | 05/23 08:00 | 44 | [108] Alessandro Giannessi v Calvin Hemery [269] | 7-5,6-3 | |
| ATP Rome Qual | 05/13 11:40 | 45 | [110] Alessandro Giannessi v Ernesto Escobedo [81] | 3-6,4-6 | |
| Challenger Francavilla | 04/30 13:00 | 29 | [219] Pedro Sousa v Alessandro Giannessi [121] | 6-3,7-6 | |
| Challenger Francavilla | 04/29 14:50 | 28 | [225] Stefano Travaglia v Alessandro Giannessi [121] | 7-5,4-6,2-6 |
Alessandro Giannessi (ur. 30 maja 1990 w La Spezii) – włoski tenisista, reprezentant w Pucharze Davsa.