Visca first scored in the 29th minute, shooting home from the right side of the penalty area. After South Korea midfielder Lee Jae-sung equalized, Visca was left alone on the edge of the area late in the first half and shot low past goalkeeper Kim Seung-gyu.
The Turkey-based midfielder volleyed in his third goal in the 80th.
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South Korea played with a three-man backline that included captain Ki Sung-yueng, who was making his 100th appearance for his country.