PARIS (AFP) - Tunisia shocked Nigeria and Burkina Faso edged Gabon to set up an Africa Cup of Nations last-eight showdown, while minnows Comoros prepared to use an outfield player as a goalkeeper when they confront hosts Cameroon.
Veteran Youssef Msakni scored two minutes into the second half to give previously unimpressive Tunisia a 1-0 second-round triumph over 10-man Nigeria in Garoua.
Nigerian hopes of levelling were dealt a huge blow midway through the second half when Alex Iwobi, initially yellow-carded for a stamp on Msakni, was sent off after the referee looked at the VAR monitor.
In the first last-16 match, Burkina Faso needed a penalty shootout to eliminate Gabon, who forced a 1-1 draw after extra time having played 56 minutes with 10 men following the red-carding of Sidney Obissa.