Stadium: Hard Court Central Round: 29 Ground: Hardcourt outdoor
| ITF - M15 Héraklion - Doubles Hommes | 2021/06/11 07:00 | Hua R / Zhang Z v Thanos A / Tsitsipas P | 6-4,6-4 |
| ITF - M15 Héraklion - Doubles Hommes | 2021/06/10 11:35 | Hua R / Zhang Z v Ginat R / Simon S | 6-1,6-2 |
| ITF - M15 Héraklion - Doubles Hommes | 2021/06/08 12:55 | Hua R / Zhang Z v Jones/Wendelken | 6-4,6-1 |
| ITF - M15 Héraklion - Doubles Hommes | 2021/06/05 10:10 | Hua R / Zhang Z v Mochizuki/Niki | 3-6,4-6 |
| ITF - M15 Héraklion - Doubles Hommes | 2021/06/04 12:00 | Hua R / Zhang Z v Alvarez Varona/Alves | 7-6,6-3 |
| ITF - M15 Héraklion - Doubles Hommes | 2021/06/03 13:05 | Hua R / Zhang Z v Donski/Moeller | 6-4,3-6,10-4 |
| ITF - M15 Héraklion - Doubles Hommes | 2021/06/01 12:10 | Hua R / Zhang Z v Trongcharoenchaikul/Wattanakul | 4-6,6-1,10-6 |
| ITF - M15 Héraklion - Doubles Hommes | 2021/05/28 11:35 | Hua R / Zhang Z v Cash/Stalder | 6-7,3-6 |
| ITF - M15 Héraklion - Doubles Hommes | 2021/06/11 10:15 | Ochi/Uzhylovskyi v Burruchaga/March | 6-4,6-2 |
| ITF - M15 Héraklion - Doubles Hommes | 2021/06/08 10:00 | Ochi/Uzhylovskyi v Caripi/Stevenson | 6-0,4-6,12-10 |