Both teams reached the finals after beating regional rivals Senegal and Morocco in the semifinals respectively.
Nigeria beat Senegal 76-71 and Tunisia beat surprise package Morocco 60-52 in the opening tie of the semis.
For defending champions Nigeria, playing in the finals represent a huge chance to repeat as winners for the first time in the country’s history.
Despite missing key players from the 2015 winning team and playing poorly in the preliminary rounds, D’Tigers have seen games through thanks to the elite production of Captain Ike Diogu who scored 31 points in the 78-77 win over ivory Cast.
For Tunisia, winning the competition is the best remedy for the heartbreaking semifinal loss in 2015; by making the finals, Coach Mario Palma becomes the first Coach in the competition to feature in five final games after his previous four with Angola.
The competition has been great for Tunisia who missed out on top duo Salah Mejri of Dallas Mavericks and Michael Roll.
Senegal and Morocco will battle for third place at 15:30 GMT.
By Yaw Adjei-Mintah
@YawMintYM on Twitter
