South Africa, Egypt and Zambia all booked places in the 2015 African Under-23 Championships in Senegal, with wins in their qualifiers.
The South Africans comfortably beat neighbours Zimbabwe 3-0, while Egypt beat Uganda 2-1 and Zambia squeezed past Ivory Coast on penalties.
The championships in Senegal start on 28 November.
They also serve as qualifiers for the Rio Olympics in 2016.
|African U23 qualifying results:|
|01/08/15: Uganda 1-2 Egypt (agg 1-6)||02/08/15: Congo 0-0 Nigeria (agg 2-1)|
|01/08/15: Zambia 0-0 Ivory Coast (agg 0-0 - 4-3 pen)||02/08/15: Mali 2-0 Gabon (agg 3-0)|
|01/08/15: South Africa 3-0 Zimbabwe (agg 4-1)||26/07/15: Sierra Leone 0-0 Algeria (agg 0-2)|
|01/08/15: Tunisia 2-0 Morocco (agg 2-1)||Qualified teams: Senegal (hosts), Egypt, Zambia, South Africa, Tunisia, Nigeria, Mali and Algeria|
The three sides join hosts Senegal and Algeria at the tournament, after Algeria sealed their qualification last week.
Eight nations will compete at the African Under-23 Championships, with the top three securing places in Brazil.
Two goals from Keegan Dolly and another by Gift Motupa ensured the South Africans advanced 4-1 on aggregate.
Coach Owen Da Gama's side are bidding to secure South Africa's first appearance at the Olympics football tournament since the 2000 event in Sydney.
Egypt, meanwhile, beat Uganda 2-1 in Kampala in the second leg of their qualifier on Saturday to seal a 6-1 aggregate victory.
Egypt's danger man, Mahmoud Abdelmonem Ablehamid Soliman, also known as Kahraba, was again their big threat at the Mandela National Stadium at Namboole, scoring both goals.
He also scored two of their goals in their 4-0 first leg victory in Alexandria.
"This is a very important win because we have made sure we pick up victories both home and away," Egypt coach Hosam El Badry said.
Zambia squeezed through to the finals in Senegal 4-3 on penalties against Ivory Coast in front of their home crowd in Lusaka.
Both matches in the tie had ended goal-less.