| Paraguay Open | 2019/09/11 16:30 | Gaston Alto v Kai Zhang | W | 3-2 |
| WTT Contender Lasko | 2021/11/02 17:35 | Gaston Alto v Hiroto Shinozuka | L | 0-3 |
| WTT Contender Lasko | 2021/11/02 09:10 | Gaston Alto v Irvin Bertrand | W | 3-2 |
| WTT Contender Tunis | 2021/10/24 15:45 | Tomas Polansky v Gaston Alto | L | 3-2 |
| Olympics 2020 - Men | 2021/07/24 11:15 | Alvaro Robles v Gaston Alto | L | 4-1 |
| Latin American Olympic Quals | 2021/04/14 15:15 | Jorge Campos v Gaston Alto | L | 4-1 |
| Latin American Olympic Quals | 2021/04/13 19:00 | Santos, Emil v Gaston Alto | W | 1-4 |
| WTT Star Contender Doha | 2021/03/06 15:00 | Gaston Alto v Martin Allegro | L | 0-3 |
| Challenger Ochsenhausen | 2020/11/17 14:15 | Florian Bluhm v Gaston Alto | L | 3-0 |
| Challenge Plus Portugal Open 2020, MS, Quali | 2020/02/14 14:50 | Alberto Mino v Kai Zhang | L | 4-1 |
| German Open 2020, MS | 2020/01/28 16:35 | Monteiro, Thiago v Kai Zhang | W | 2-4 |
| North American Open | 2019/12/05 18:15 | Ren, Hao v Kai Zhang | L | 4-0 |
| Team World Cup, Doubles | 2019/11/07 11:30 | Jingkun Liang v Kai Zhang | L | 3-0 |
| Team World Cup, Doubles | 2019/11/07 02:00 | Elias Ranefur v Kai Zhang | W | 1-3 |
| Paraguay Open | 2019/09/13 16:35 | Kai Zhang v Horacio Cifuentes | L | 1-4 |
| Paraguay Open | 2019/09/12 18:00 | Koki Niwa v Kai Zhang | W | 2-4 |
| Paraguay Open | 2019/09/11 20:20 | Kai Zhang v Daniel Gonzalez | L | 3-4 |