Mertesacker expressed his gratitude towards Ali, saying he was fantastic both professionally and personally. He is proud of Ali's development and the support he provided to both the under-21s and the first team.

Mertesacker noted that since his appointment, Ali has been fabulous. He thanked Ali for his contributions and wished him well in his new role, where he will make a difference in the Premier League.

Arsenal places a strong emphasis on coach development, and Mertesacker is proud of Ali for making the most of the opportunities he was given. Throughout his time with the club, Ali has demonstrated a commitment to lifelong learning.

As Ali departs, Max Porter and Ken Gillard will take joint interim charge of the under-21s. The academy is continuing to work towards appointing a permanent successor to Ali's role.