| All Africa Team Championships | 02/15 15:00 | - | Коцейла Маммери v Victor Ikechukwu | L | 0-2 | |
| Кубок Томаса | 05/10 07:00 | - | Джун Пен Жао v Коцейла Маммери | L | 2-0 | |
| Корея Мастерс | 04/13 01:00 | 5 | Коцейла Маммери v Hong Yang Weng | L | 0-2 | |
| Открытый чемпионат Кореи | 04/06 01:20 | 5 | Кодай Нараока v Коцейла Маммери | L | 2-0 | |
| Открытый чемпионат Швейцарии - Квал. | 03/22 12:00 | - | Коцейла Маммери v Иикка Хейно | L | 0-2 | |
| All Africa Team Championships | 02/17 06:20 | - | Мелвин Аппиа v Коцейла Маммери | W | 0-2 | |
| Орлеан Мастерс - Квал. | 03/23 10:20 | 5 | Коцейла Маммери v Дэвид Ким | L | 0-2 | |
| All Africa Individual Championships | 02/14 16:00 | - | Ахмед Сатах v Коцейла Маммери | W | 1-2 | |
| All Africa Individual Championships | 02/14 09:00 | - | Felix Bengono v Коцейла Маммери | W | 0-2 | |
| All Africa Team Championships | 02/10 09:00 | - | Коцейла Маммери v OUZAIER KHAYATI | W | 2-0 | |
| Италия Межд. Квал. | 12/12 12:25 | - | Коцейла Маммери v Арно Меркле | L | 0-2 | |
| Indonesia Masters XD | 05/23 13:30 | 1 | Владимир Иванов v Коцейла Маммери | L | 2-0 |
Koceila Julien Mammeri (born 23 February 1999) is a French-Algerian badminton player who trained at the Oullins club in France. In the junior event, he was the third place at the Portugal International tournament in the boys' doubles event. He won gold medals at the 2017, 2019, 2020, 2021 and 2022 African Championships for men's doubles with his partner Youcef Sabri Medel, and in 2018 and 2019 for mixed doubles with Linda Mazri, and also in 2021 and 2022 for mixed doubles with Tanina Mammeri. He claimed the mixed doubles gold medals at the 2019 African Games with Mazri and in 2023 with Tanina Mammeri. He also won another gold in the men's doubles in 2023 with Medel.