Meanwhile in Mavuso, Eswatini grabbed their first point of the qualifiers, holding Congo to a barren stalemate in Group I.
Congo lie second on seven points, five behind leaders and already qualified Senegal, and four more than third placed Guinea Bissau.
The first half was a story of rare chances. Congo had the first chance after eight minutes. Mavis Dufounou shot from a free kick was pushed by Knowledge Sandanezwe before rebounding off the post to a corner kick.
Eswatini tried to deploy long balls behind Congo’s defense but without really threatening Henri Mafoumbi between Congo’s posts.
It was not a different story in the second half, with both sides cautiously trying to find the net.
Eswatini had a glorious chance to bury the game after 80 minutes. Fanelo Mamba received the ball just outside the area and sent a scorcher that rebounded from the right post with Congo’s goalkeeper Mafoumbi beaten.
Substitiue Promise Dlamini could have won it for the hosts deep into injury time but his shot went wide as the game ended goalless.