Cameroon grabbed a last minute 1-0 win against a tough Mauritania side to move to the top of Group M, ahead of Bafana Bafana and Gambia.
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Vincent Aboubakar scored in the last minute of regulation time to hand Cameroon victory, after being held at bay by the visitors for almost the entire game.
The home side dominated the tie, Aboubakar himself had a number of opportunities, including a disallowed goal.
The victory lifts Cameroon to top of the group after the opening round of matches, on three points.
South Africa and Gambia, who drew 1-1 on Saturday, are tied on one point in second and third, while Mauritania are bottom with zero points.
Bafana travel to play Mauritania in the next round in September, while Cameroon visit Gambia.