SAO PAULO, June 26 (Reuters) - Belgium keeper Thibaut Courtois showed why he is considered among the world's best by producing one superb first-half stop as South Korea's unlikely bid to avoid a World Cup exit floundered on Thursday.
Courtois made an instinctive save to keep out Ki Sung-yeung's low blast as the Group H clash produced no goals in the opening 45 minutes. Belgium's Steven Defour was shown a straight red card for a studs-up challenge in the closing moments of the half.
The Koreans must beat already-qualified Belgium, who made seven changes to their starting side, and hope the result of the other group game between Russia and Algeria goes their way if they are to stand any chance of progressing to the last 16. (Editing by Justin Palmer)