Gelson Dala raised his Africa Cup of Nations goal tally to four with a brace for 10-man Angola in a 3-0 last-16 triumph over Namibia in Bouake on Saturday.
Surprise package Angola will face Nigeria’s Super Eagles who defeated Cameroon in Abidjan, in a quarter-final next Friday.
After Dala scored twice in the first half, Mabululu netted midway through the second half to effectively end as a contest the clash of southern Africa neighbours.
Both teams were reduced to 10 men by first-half red cards with Angola goalkeeper Neblu and Namibia defender Lubeni Haukongo sent off.
The winning margin was a record for Angola, bettering two-goal victories over Senegal and Malawi in previous Cup of Nations.
The first of eight second-round fixtures was not one that would have been anticipated when the African football showpiece kicked off in the Ivory Coast 14 days ago.
Angola won a group ahead of Burkina Faso, Mauritania and shock casualties Algeria when they were expected to finish third at best given an AFCON record of just four victories in 26 matches.