In 2011, Won entered his first World Championship Final, the 16th Samsung Cup, by defeating Pak Yeong-hun in the quarter-finals, and Chen Yaoye 2-1 in a hard fought semi-final to face the defending champion Gu Li, who respectively defeated former winner Lee Chang-ho, then rising Korean star Na Hyun 2-0.
In 2011, Won entered his first World Championship Final, the Samsung Cup, after defeating Pak Yeong-hun in the quarter-finals and Chen Yaoye 2-1 in a tough semi-final to meet defending champion Gu Li, who had defeated Lee Chang-ho and Na Hyun 2-0.