The Flames of Malawi are currently the most likely the team who will battle the Super Eagles for a ticket in the AFCON quarterfinal Sunday.
Group D winners Nigeria will take on the best third losers in Group B, E or F.
Malawi finished third in Group B with four points after they held Senegal to a goalless draw Tuesday night.
Sierra Leone are third in Group E with a round of games still to be played.
They have two points from as many matches and tackle second-placed Equatorial Guinea in the final group game tomorrow.
Tunisia are third thus far in Group F with three points.
They take on group leaders Gambia in their final game Thursday.