Stadium: 1573 Arena Round: 44 Ground: Hardcourt outdoor
| Australian Open WC | 2019/12/07 04:30 | Jason Jung v Duckhee Lee | 6-2,6-1 |
| Australian Open WC | 2019/12/06 02:00 | Ze Zhang v Duckhee Lee | 5-7,3-6 |
| Australian Open WC | 2019/12/05 02:00 | Duckhee Lee v Sho Shimabukuro | 6-2,6-1 |
| ITF M15 Nonthaburi | 2019/12/01 02:55 | Duckhee Lee v Shintaro Imai | 6-1,6-4 |
| ITF M15 Nonthaburi | 2019/11/30 05:25 | Duckhee Lee v Florent Bax | 6-1,6-1 |
| ITF M15 Nonthaburi | 2019/11/29 03:00 | Duckhee Lee v Keisuke Saitoh | 6-2,6-1 |
| ITF M15 Nonthaburi | 2019/11/28 04:40 | Duckhee Lee v Blake Ellis | 6-3,6-1 |
| ITF M15 Nonthaburi | 2019/11/27 02:30 | Duckhee Lee v Naoki Nakagawa | 6-1,6-4 |
| Challenger Hamburg | 2019/10/23 18:00 | Cedrik-Marcel Stebe v Alessandro Giannessi | 6-2,6-3 |
| Challenger Santo Domingo | 2019/10/11 23:00 | Alessandro Giannessi v Hugo Dellien | 3-6,1-6 |
| Challenger Santo Domingo | 2019/10/09 19:20 | Thiago Seyboth Wild v Alessandro Giannessi | 1-6,4-6 |
| Challenger Barcelona | 2019/10/05 09:00 | Jozef Kovalik v Alessandro Giannessi | 6-3,7-6 |
| Challenger Barcelona | 2019/10/04 10:30 | Alessandro Giannessi v Filippo Baldi | 5-7,6-0,6-1 |
| Challenger Barcelona | 2019/10/03 10:30 | Filip Horansky v Alessandro Giannessi | 6-7,7-6,4-6 |
| Challenger Barcelona | 2019/10/02 09:00 | Ivan Nedelko v Alessandro Giannessi | 1-6,4-6 |
| Challenger Florence | 2019/09/26 14:05 | Philipp Kohlschreiber v Alessandro Giannessi | 4-6,6-4,6-3 |