Ademola Lookman scored the only goal as Nigeria edged out Angola to book their place in the Africa Cup of Nations semi-finals.
The Atalanta winger struck four minutes before half-time in Abijdan, turning in Moses Simon's cross to book a last-four date with either Cape Verde or South Africa.
Bidding to reach their first semi-final, Angola made a bright start and were denied in the fourth minute when Stanley Nwabali kept out Mabululu's close-range volley.
However, it was Nigeria who hit the front in the 41st minute. Simon skipped away from Kialonda Gaspar's sliding challenge and squared the ball for Lookman to fire into the roof of the net.
Angola almost responded just before the hour mark. Substitute Zine latched onto Show's throughball and beat Nwabali, only to see his first-time shot bounce back off the post.
Although VAR denied Victor Osimhen, whose header from Lookman’s free-kick was chalked off for offside, the Super Eagles held out to secure their passage into the semi-finals.