Ghana face Peru in the quarter-finals on Saturday
Ghana knocked tournament favourites Brazil out of the under-17 World Cup in South Korea with a 1-0 win on Wednesday.
Isaac Donkor scored the only goal of the game with a deflected shot on 51 minutes.
The Black Starlets played the entire second half of the game in Gwanyang with ten men after Francis Boadi was sent off a minute before the break.
They were very effective on the counter-attack against the skilful Brazilians.
Ghana will play Peru in the quarter-finals on Saturday in Changwon.
Meanwhile, Tunisia suffered a 3-1 defeat in extra time against France. in another second-round tie.
France took the lead just before half-time with a free-kick from Henri Saivet, but Nour Hadhria gave the Carthage Eaglets the equaliser four minutes after the break with a stunning 25-metre drive.
It was still 1-1 after 90 minutes, but France scored twice in extra time through Damien Le Tallec.
Tunisia had been reduced to ten men after 76 minutes, when Mohamed Karoui was sent off for a foul.
The resultant penalty was saved by goalkeeper Habib Tounsi.
Nigeria play Colombia on Thursday in a second round match in Gwangyang.