A solitary goal from Ademola Lookman secured a semi-final spot for Nigeria as they eliminated Angola on Friday.
Angola started the match on a good note and had an opportunity to take the lead inside four minutes when Gilberto flicked a corner kick to Mabululu, but the in-form striker was denied by Stanley Nwabali from close range.
Nigeria threatened to score in the 14th minute when Ogochukwu Onyeka played a cross, which Victor Osimhen headed over the crossbar.
Eight minutes later Simon Moses played yet another good cross, this time around Victor Osimhen put a good header straight to Angolan goalkeeper Signori Dominique.
In the 41st minute Nigeria finally broke the deadlock after a lovely play from speedy winger Moses Simon, who laid an assist for Ademola Lookman to make it 1-0 for the Super Eagles.
Nigeria started with high intensity in the second, as they looked to double the lead, with Moses Simon and Ademola Lookman troubling Angola.
Th Super Eagles were close to doubling their lead in the 56th minute but Ughelumba headed the ball over the crossbar.
After 58 minutes gone Angola had a glorious chance to level matters, but Nwabali denied Zini and the ball hit the upright.
After an hour of football, Nigeria was awarded a free-kick just outside the box when Moses was fouled. Zaidu stepped up but Sugnori Dominique denied him.
Nigerian thought they doubled their lead in the 75th after Osimhen produced a glorious header but VAR ruled the goal offside.
Nwabali denied Angola again injury-time to keep his fourth clean sheet of the tournament, as Nigeria became the first team to qualify for the semi-finals of the tournament.
