Koreans in with medal shot.
Ji Dong-won helped South Korea into the quarter-finals of the Olympic mens' football tournament yesterday.
The Sunderland striker appeared as a substitute as the Koreans drew 0-0 with Gabon in front of a crowd of 76,927 at Wembley.
Both sides struggled to create chances, with Gabon coming closest when Levy Madinda's shot struck the post.
Dong-won entered the fray off the bench just after the hour, replacing Kim Bo-Kyung, and almost had an impact when he crossed for Arsenal's Park Chu-Young, who couldn't direct a header on target.
The point gained saw the Koreans qualify from Group B along with Mexico, and they will now face Team GB in the last eight at Cardiff's Millennium Stadium.
GB secured top spot in Group A yesterday by beating Uruguay thanks to a lone goal from Daniel Sturridge.