Cameroon booked their place in next year's African Cup of Nations finals after claiming a narrow 1-0 home victory over the DR Congo on Saturday.
Porto striker Vincent Aboubakar netted the winner on 71 minutes when he latched onto a deft through pass to break clear and place his shot between the legs of the DR Congo keeper and into the net.
Cameroon, who had an impressive and unbeaten qualifying campaign which included a 4-1 victory over the Ivory Coast, are on top of Group D with 13 points, four clear of the Elephants who defeated bottom side Sierra Leone 5-1 on Friday.
They have reached the biennial tournament for the first time since 2010, having missed out on the 2012 and 2013 editions.
DR Congo are third with six points and they still have a chance of obtaining the second group ticket to the Nations Cup.
If they beat Sierra Leone and Ivory Coast lose to Cameroon in the final round, they will advance to next year's Equatorial Guinea finals virtue of a better head-to-head record over the Ivory Coast.
Zambia are also through to the Nations Cup after securing a 1-0 win away to Mozambique, thanks to a 67th-minute goal from striker Given Singuluma.
They are second in their group with eight points, three ahead of third-placed Mozambique with one match remaining.
Even if Mozambique beat Niger and Zambia lose to leaders Cape Verde in the final round, the Chipolopolo will prevail due to their better head-to-head record over Mozambique.
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