Abdul-Hamid, who became Ahli's only senior keeper following the surprise departure of Essam Al-Hadari, is still nursing an inflamed knee tendon and an Ahli official said that he was doubtful for Sunday's game.
Ahli's official website said on Thursday that the 29-year-old guardian is working closely with goalkeeping coach Ahmed Nagui to be fit for the decisive African encounter.
Ahli had lost the first-leg against Platinum Stars 2-1 in South Africa and the five-time African champions need a victory in Cairo to secure a place in the group stage.
Abdul-Hamid's injury had left Ahli's technical staff sweating since they had to depend on youngsters Ahmed Abdul-Monem and Mohamed Al-Shinawi.
Abdul-Monem conceded two goals in the 2-0 defeat to Ittihad last week while Al-Shinawi conceded three as Ahli succumbed to their second league defeat on Tuesday.