| Challenger Losinj | 10/23 10:35 | 27 | [204] Alessandro Giannessi v Raul Brancaccio [319] | 6-3,6-7,6-1 | |
| Challenger Losinj | 10/20 12:00 | 26 | [204] Alessandro Giannessi v Franco Agamenone [210] | 7-6,3-6,6-1 | |
| Challenger Losinj | 10/19 08:00 | 25 | [204] Alessandro Giannessi v Robin Haase [229] | 7-6,7-5 | |
| Challenger Napoli | 10/05 11:00 | 25 | [439] Matteo Arnaldi v Alessandro Giannessi [185] | Retired | |
| Challenger Lisbon | 09/27 15:00 | 25 | Giulio Zeppieri v Alessandro Giannessi | Cancelled | |
| Challenger Braga | 09/22 09:00 | 26 | [247] Jesper De Jong v Alessandro Giannessi [182] | 6-3,7-5 | |
| Challenger Braga | 09/21 09:00 | 25 | [371] Kaichi Uchida v Alessandro Giannessi [182] | 4-6,1-6 | |
| Challenger Como | 08/30 11:05 | 25 | Riccardo Bonadio v Alessandro Giannessi | Cancelled | |
| US Open | 08/25 20:35 | 14 | [171] Alessandro Giannessi v Hugo Dellien [137] | 1-6,3-6 | |
| Challenger Trieste | 07/29 15:05 | 26 | [169] Alessandro Giannessi v Vitaliy Sachko [271] | 7-6,4-6,0-6 | |
| Challenger Trieste | 07/28 08:00 | 25 | [169] Alessandro Giannessi v Rudolf Molleker [375] | 4-6,6-2,6-1 | |
| ATP Umag | 07/21 14:30 | 26 | [177] Alessandro Giannessi v Richard Gasquet [59] | 6-7,4-6 | |
| ATP Umag | 07/20 14:00 | 25 | [177] Alessandro Giannessi v Jiri Vesely [86] | 7-6,7-5 | |
| ATP Umag | 07/19 14:30 | 19 | [177] Alessandro Giannessi v Renzo Olivo [215] | 7-6,6-1 | |
| ATP Umag | 07/18 14:00 | 14 | [168] Alessandro Giannessi v Rudolf Molleker [314] | 6-3,7-5 | |
| ATP Hamburg | 07/11 10:30 | 19 | [200] Maximilian Marterer v Alessandro Giannessi [163] | 3-6,6-3,7-5 | |
| ATP Hamburg | 07/10 12:05 | 14 | [235] Tobias Kamke v Alessandro Giannessi [163] | 3-6,4-6 | |
| Wimbledon | 06/22 10:00 | 14 | [122] Bernabe Zapata Miralles v Alessandro Giannessi [162] | 7-6,6-3 | |
| Challenger Forli | 06/15 16:05 | 25 | [467] Jacopo Berrettini v Alessandro Giannessi [162] | 6-1,7-6 | |
| Challenger Lyon | 06/07 09:40 | 25 | Bjorn Fratangelo v Alessandro Giannessi | Cancelled | |
| French Open | 05/30 12:30 | 23 | [49] Kei Nishikori v Alessandro Giannessi [159] | 6-4,6-7,6-3,4-6,6-4 | |
| French Open | 05/28 11:05 | 19 | [116] Francisco Cerundolo v Alessandro Giannessi [159] | 4-6,6-3,2-6 | |
| French Open | 05/26 13:10 | 15 | [159] Alessandro Giannessi v Tallon Griekspoor [131] | 7-5,7-5 | |
| French Open | 05/25 11:25 | 14 | [200] Ruben Bemelmans v Alessandro Giannessi [159] | 4-6,7-6,5-7 | |
| ATP Lyon | 05/17 08:00 | 19 | [160] Alessandro Giannessi v Kamil Majchrzak [129] | 4-6,3-6 | |
| ATP Lyon | 05/16 09:40 | 14 | [244] Peter Polansky v Alessandro Giannessi [161] | 3-6,4-6 | |
| ATP Lyon | 05/16 09:20 | 14 | Lorenzo Musetti v Alessandro Giannessi | Cancelled | |
| Challenger Heilbronn | 05/12 13:15 | 26 | [161] Alessandro Giannessi v Daniel Elahi Galan [110] | 7-6,6-7,4-6 | |
| Challenger Heilbronn | 05/10 15:40 | 25 | [161] Alessandro Giannessi v Prajnesh Gunneswaran [148] | 7-6,6-1 | |
| Challenger Biella | 05/04 08:00 | 25 | [159] Alessandro Giannessi v Juan P Varillas [150] | 4-6,5-7 |
Alessandro Giannessi (ur. 30 maja 1990 w La Spezii) – włoski tenisista, reprezentant w Pucharze Davsa.