Ayanda Jamta, 24, and his friends had started arguing while watching the game at a tavern in Walmer, Port Elizabeth around 4.50PM on Saturday, said Colonel Priscilla Naidu.
According to Sport24, the two teams were at one goal each and three minutes of extra time had been added to the game at that stage.
Naidu said that a man who was not part of the friend group started shooting at the trio inside the bar. The reason was not clear.
Jamta was hit on the left side of his back and died at the scene. His 27-year-old friend was shot in the shoulder and the other friend was shot several times.
The shooter fled the scene.
Police in the area spotted a man acting suspiciously and discovered a revolver in his possession after searching him.
The revolver had been reported stolen during a housebreaking earlier this month.
The man is expected to appear in court on Monday to face a murder charge and two charges of attempted murder.