Guinea coach Robert Nouzaret praised his side's ability to recover from their opening defeat to Ghana after they secured a 3-2 win over Morocco.
Nouzaret will be without Feindouno for the last group game
Guinea captain Pascal Feindouno scored twice and set up the Syli Nationale's other goal before he was sent off.
"After our defeat by Ghana I was waiting for a reaction on the technical, physical and mental front," said Frenchman Nouzaret.
"It's not easy when you have to win. We played better than our opening game."
And Nouzaret remained philosophical over Feindouno's absence for Guinea's last Group A game with Namibia following his dismissal.
"The minute the referee sent him off I thought of that. It's very important but I'll just have to find a different format without Pascal."
Morocco striker Youssef Hadji was also critical of South African referee Jerome Damon, who awarded a penalty that was to send Guinea 3-1 ahead.
"The referee made a big mistake, the fall was outside the penalty area," he said.
"But now we have to concentrate on the Ghana game, it will be very important."
Morocco's French coach Henri Michel pinpointed defensive weaknesses as the reason for the Atlas Lions' defeat.
"We gave away too many presents," said Michel.
"There was no Moroccan presence at the near post when they scored with the free-kick, then we gave away a penalty.
"We've got to produce something special now against Ghana if we are to continue."