BBC Sport Online takes a look at the group standings:

Group 1
Nigeria have already qualified. Angola host Malawi in Luanda on Sunday in a match of academic interest only.

Group 2
Guinea will qualify with a draw at home to Ethiopia in Conakry on Sunday, but if they lose their visitors are through to the finals for the first time since 1982. In the group's other game, Niger will host Liberia in Niamey. Both sides have no chance of going to Tunisia.

Group 3
Benin will qualify for the first time if they beat Zambia, but a draw in Cotonou on Sunday is good enough for Zambia to go through to the finals. Sudan and Tanzania, who play in Khartoum are out of the race.

Group 4
The stakes are high here with various possibilities. Burkina Faso will win the group if they triumph away at the Central African Republic (CAR). If they draw they are also likely to qualify unless Congo beat Mozambique by five goals, in which case the Congolese will go through.

If Burkina Faso lose in Bangui on Sunday, then Congo will qualify, if they beat Mozambique in Brazzaville.

Mozambique can only qualify if they beat Congo and Burkina Faso lose to CAR and there is a major swing in the goal difference.

Congo DR are far from being safe

Group 5
Kenya will win the group with a home victory over Cape Verde. A Kenyan draw would allow Togo to finish at the top, as long as they win away at Mauritania. Cape Verde can qualify if they beat Kenya and end up having a better goal difference than Togo.

Group 6
Mali and Zimbabwe are equal on points but Mali are two goals ahead on goal difference. Zimbabwe are at home to Eritrea on Saturday while Mali play away at the Seychelles.

If the top two teams win, the runner-up in the group could still qualify for Tunisia as the best runner-up in the Nations Cup qualifying campaign.

Group 7
Morocco need just a draw in Equatorial Guinea to qualify, but if they lose then Sierra Leone can take top place by beating Gabon in Libreville. Sierra Leone could also still qualify as the best-placed runner-up but they must win on Sunday.

Group 8
Senegal have qualified, rendering the match between Lesotho and the Gambia meaningless.

Group 9
The Democratic Republic of Congo will qualify if they beat Botswana on Saturday but if they draw, Swaziland could snatch the ticket by winning away in Libya. A loss for the Simbas in Gaborone could open up a remote chance for the Libyans to go to Tunisia. But they must win handsomely against the Swazis.

Group 10
Egypt will qualify as long as Madagascar do not beat Mauritius in Antananarivo by more than 17 goals.

Group 11
South Africa need a draw in Bujumbura on Sunday to qualify, but if they lose to Burundi then Ivory Coast go to the Nations Cup finals.

Group 12
Algeria have already qualified but they will say goodbye to coach George Leekens after his last match in Chad on Sunday.