كتب : وكالات
Following weeks of speculation, Ahli finally announced that 'Youssef's resignation has been accepted by the board'.
Although expected by many, the decision came in contrast to newly-hired chairman Mahmoud Taher's promise that Youssef will remain in charge until the end of the season.
Football directors Sayed Abdul-Hafiz and Hadi Khashaba have also been sacked.
Former Ahli defender Mabrouk will now be in charge of the team on an interim basis for a fourth stint.
Youssef's position has been under scrutiny since the early Champions League exit at the hands of Ahli Benghazi last month.
New boss Mabrouk will be hoping to guide the African powerhouses to a first-ever Confederation Cup title.