USM Alger and ASEC Mimosas need to overturn firs-leg deficits in the preliminary second round if they want to qualify for the CAF Confederation Cup group stages.
USM Alger are trailing 1-0 to Stade Tunisien going into the second leg at the Miloud Hadefi Stadium on Sunday.
The 2022-23 champions have to win by two goals in Oran without conceding to avoid extra time.
ASEC Mimosas have an away goal to work with at least as they prepare to welcome ASC Kara to the Felix Houphouet Boigny Stadium on Sunday.
Les Mimos suffered a 2-1 defeat in the first leg in Lome last weekend, although Abdul Razack Cisses 94th-minute goal kept their hopes alive.
