Lyle Foster's brace helped South Africa to a 2-0 win against Mauritius, while Lesotho and Zimbabwe played to a goalless draw in the COSAFA U20 Champs.
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Angola crashed out of the Cosafa Cup after failing to score for a second successive match and being pipped to top place in Group A by Tanzania.
Tanzania claimed a first-ever victory at the COSAFA Castle Cup at the eighth attempt after breezing past Malawi on Sunday.
Mauritius and Madagascar reached the Second Round of qualification for the African Nations Championship.
Singapore legend Fandi Ahmad will return to management when his newly formed Singapore Under-20 side take on the Mauritius U21s on March 11.