| Indonesia Masters XD | 01/10 07:15 | 5 | Zulkiffli, Zulfadi v Jun Hao Leong | L | 0-2 | |
| Macau Open 2019, MS | 11/10 08:30 | 3 | Shih, K. C. v Zulkiffli, Zulfadi | W | 1-2 | |
| Macau Open 2019, MS | 11/09 06:30 | 4 | Zulkiffli, Zulfadi v Lim, C. W. | W | 2-1 | |
| Macau Open 2019, MS | 11/08 08:30 | 5 | Wong, H. S. v Zulkiffli, Zulfadi | W | 0-2 | |
| Macau Open 2019, MS | 11/07 12:20 | 6 | Phuah, Vincent Cheng Wei v Zulkiffli, Zulfadi | W | 0-2 | |
| Giraldilla Int. XD | 09/05 12:05 | 6 | Lin, Chia Hsuan v Zulkiffli, Zulfadi | L | 2-0 | |
| Open d'Angleterre | 08/23 10:30 | 5 | Saensomboonsuk, Tanongsak v Zulkiffli, Zulfadi | L | 2-0 | |
| Open d'Angleterre | 08/21 16:30 | 6 | Zulkiffli, Zulfadi v Pochtarov, Artem | W | 2-1 | |
| Indonesia Masters XD | 07/20 20:45 | 5 | Zulkiffli, Zulfadi v Heo, Kwang Hee | L | 0-2 | |
| Indonesia Masters XD | 07/19 19:30 | 6 | Zulkiffli, Zulfadi v Wolfgang Gnedt | W | 2-0 | |
| Open d'Angleterre | 06/22 08:00 | 4 | Lee, Hyun Il v Zulkiffli, Zulfadi | L | 2-0 | |
| Giraldilla Int. XD | 06/21 04:25 | 5 | Ueda, Takuma v Zulkiffli, Zulfadi | W | 0-2 | |
| Open de Thaïlande | 05/31 11:20 | 5 | Cheuk Yiu Lee v Zulkiffli, Zulfadi | L | 2-0 | |
| Open de Thaïlande | 05/30 13:30 | 6 | Jarasjindawong, Pollakorn v Zulkiffli, Zulfadi | W | 0-2 | |
| Open d'Angleterre | 04/26 04:00 | 5 | Mustofa, Ihsan Maulana v Zulkiffli, Zulfadi | L | 2-1 | |
| Open d'Angleterre | 04/13 10:10 | 4 | Zulkiffli, Zulfadi v Wong, Wing Ki Vincent | L | 0-2 | |
| Open d'Angleterre | 04/12 08:30 | 5 | Hsu, Jen Hao v Zulkiffli, Zulfadi | W | 0-2 | |
| California Int. Women | 03/08 17:40 | 5 | Zulkiffli, Zulfadi v Lin, Dan | L | 0-2 | |
| Indonesia Masters XD | 02/12 01:58 | - | Zulkiffli, Zulfadi v Holst, Emil | W | 3-2 | |
| Indonesia Masters XD | 02/10 07:48 | - | Zulkiffli, Zulfadi v Tien Chen Chou | L | 0-3 | |
| Open d'Angleterre | 01/27 10:10 | 3 | Srikanth Kidambi v Zulkiffli, Zulfadi | L | 2-0 | |
| Open d'Angleterre | 01/26 11:55 | 4 | Zulkiffli, Zulfadi v Misha Zilberman | W | 2-0 | |
| Open d'Angleterre | 01/25 13:55 | 5 | Zulkiffli, Zulfadi v Dunna, Sarath | W | 2-0 | |
| Open d'Angleterre | 01/25 05:40 | 6 | Zulkiffli, Zulfadi v Rawat, Sachin | W | 2-0 | |
| Open d'Angleterre | 01/18 05:40 | 5 | Zulkiffli, Zulfadi v Hsueh, H. Y. | L | 1-2 | |
| Open d'Angleterre | 01/17 11:55 | 6 | Zulkiffli, Zulfadi v Abhishek Yeligar | W | 2-0 | |
| Giraldilla Int. XD | 12/22 07:51 | - | Zulkiffli, Zulfadi v Chan, Yan Kit | W | 3-1 | |
| Giraldilla Int. XD | 12/19 11:55 | - | Zulkiffli, Zulfadi v Cheam, June Wei | W | 2-1 | |
| Giraldilla Int. XD | 12/14 14:49 | - | Zulkarnain, I. v Zulkiffli, Zulfadi | L | 3-1 | |
| Open d'Angleterre | 12/06 10:00 | 6 | Zulkiffli, Zulfadi v Heo, Kwang Hee | - | Walkover |