| Challenger Rzym | 05/01 12:45 | 28 | [167] Alessandro Giannessi v Juan Manuel Cerundolo [176] | 6-4,4-6,5-7 | |
| Challenger Rzym | 04/30 11:20 | 27 | [167] Alessandro Giannessi v Thanasi Kokkinakis [209] | 7-5,3-6,7-5 | |
| Challenger Rzym | 04/28 11:20 | 26 | [167] Alessandro Giannessi v Jay Clarke [236] | 6-2,6-4 | |
| Challenger Rzym | 04/26 11:05 | 25 | [167] Alessandro Giannessi v Guido Andreozzi [217] | 6-3,6-3 | |
| Challenger Belgrade | 04/14 08:45 | 25 | [147] Blaz Rola v Alessandro Giannessi [166] | Retired | |
| Challenger Belgrade | 04/12 11:20 | 19 | [166] Alessandro Giannessi v Maxime Janvier [222] | 3-6,6-4,6-4 | |
| Challenger Belgrade | 04/11 13:05 | 14 | Alessandro Giannessi v Marko Topo | 2-6,7-6,6-2 | |
| ATP Marbella | 04/04 13:35 | 14 | [169] Alessandro Giannessi v Nikola Milojevic [148] | Retired | |
| Challenger Marbella | 04/03 10:00 | 28 | [169] Alessandro Giannessi v Gianluca Mager [102] | 7-6,4-6,1-6 | |
| Challenger Marbella | 04/02 12:00 | 27 | [161] Martin Klizan v Alessandro Giannessi [169] | 0-6,3-6 | |
| Challenger Marbella | 03/31 11:50 | 26 | [169] Alessandro Giannessi v Pedro Sousa [111] | 6-4,6-3 | |
| Challenger Marbella | 03/29 12:00 | 25 | [188] Joao Domingues v Alessandro Giannessi [169] | 3-6,4-6 | |
| Challenger Zadar | 03/24 09:00 | 26 | [169] Alessandro Giannessi v Nerman Fatic [381] | 6-7,7-5,6-7 | |
| Challenger Zadar | 03/22 14:35 | 25 | [169] Alessandro Giannessi v Riccardo Bonadio [289] | 7-5,7-5 | |
| Challenger Gran Canaria | 03/05 16:05 | 27 | [163] Alessandro Giannessi v Carlos Gimeno Valero [400] | 2-6,6-4,2-6 | |
| Challenger Gran Canaria | 03/03 13:00 | 26 | [163] Alessandro Giannessi v Nikolas S Izquierdo [363] | 7-6,7-5 | |
| Challenger Gran Canaria | 03/02 13:05 | 25 | Alessandro Giannessi v Emilio Nava | 6-2,6-3 | |
| Challenger Gran Canaria | 02/24 12:00 | 26 | [190] Steven Diez v Alessandro Giannessi [163] | 7-6,7-6 | |
| Challenger Gran Canaria | 02/23 11:00 | 25 | [283] Stefano Napolitano v Alessandro Giannessi [163] | 0-6,2-6 | |
| Challenger Biella | 02/16 14:10 | 25 | [160] Alessandro Giannessi v Thomas Fabbiano [174] | 1-6,4-6 | |
| Challenger Antalya | 02/06 09:35 | 28 | [165] Alessandro Giannessi v Jaume Munar [103] | Retired | |
| Challenger Antalya | 02/05 08:00 | 27 | [165] Alessandro Giannessi v Alejandro Tabilo [170] | 5-7,7-5,6-1 | |
| Challenger Antalya | 02/03 08:00 | 26 | [165] Alessandro Giannessi v Mohamed Safwat [147] | 6-3,6-4 | |
| Challenger Antalya | 02/02 07:30 | 25 | [132] Daniel Altmaier v Alessandro Giannessi [165] | 6-7,2-6 | |
| Challenger Antalya | 01/30 07:00 | 27 | [110] Jaume Munar v Alessandro Giannessi [165] | 3-6,6-2,6-0 | |
| Challenger Antalya | 01/29 11:00 | 26 | [228] Roberto Cid Subervi v Alessandro Giannessi [165] | 3-6,2-6 | |
| Challenger Antalya | 01/28 10:10 | 25 | [165] Alessandro Giannessi v Jozef Kovalik [125] | 6-4,7-5 | |
| Challenger Stambuł | 01/18 11:25 | 25 | [151] Lorenzo Giustino v Alessandro Giannessi [162] | 7-5,7-6 | |
| Australian Open | 01/10 10:40 | 60 | [162] Alessandro Giannessi v Mario Vilella Martinez [186] | 1-6,3-6 | |
| ATP Paryż | 10/31 10:25 | 14 | [163] Alessandro Giannessi v Radu Albot [85] | 5-7,4-6 |
Alessandro Giannessi (ur. 30 maja 1990 w La Spezii) – włoski tenisista, reprezentant w Pucharze Davsa.