Ivory Coast, S Africa, Gabon and Egypt can all qualify
Group B at the African Olympic qualifying tournament in Morocco will be decided by Saturday's final matches.
Gabon play Ivory Coast in Tangier while at the same time in Marrakesh Egypt take on South Africa.
Ivory Coast, South Africa and Egypt all know that victory will take them into the semi-finals and closer to a place at the London Olympic Games in 2012.
Gabon will only go through if they beat the Ivorians and there is also winner in the other match.
The Gabonese go into the game with two players suspended - their first choice goalkeeper Willy Mikiela and Didier Ndong.
Mikiela was shown a straight red card during the 1-1 draw with South Africa while Ndong picked a yellow card in each of the first two group games.
The Gabon coach Claude Albert Mbourounot admitted the absence of Mikiela had impacted on his preparations.
"We need to make some repairs in defence - because each goalkeeper has his own desires with regard to positioning," he told the BBC.
Meanwhile his Ivory Coast counterpart Alain Gouamene, the former Elephants goalkeeper, says a game against Gabon is like a derby game.
"It's not the same thing as it's more psychological, and the one who wants it the most will win," he told BBC Sport.
"We are coming here on to go all out and win on Saturday."
South Africa will be ruing missed chances against Gabon to win the game and put themselves in a stronger position to qualify.
They should welcome back Eric 'Tower' Mathoho to their squad for the game after he was rested last time out.
Egypt need find some confidence after their 1-0 loss to Ivory Coast and they will know that with some better finishing from the Ivorians it could have been worse.
The semi-finals of the tournament will be played on the 6 and 7 December - the top three qualify for the Olympics and the fourth-placed side face a play-off against an Asian side.