Lin Dan won the 2013 World Championships men’s singles title without dropping a game.
The 2013 championships were held in Guangzhou, China. Lin Dan, representing the host nation, defeated Malaysia’s Lee Chong Wei in the final after Chong Wei retired because of injury while trailing in the deciding game. Lin had won each of his earlier matches in straight games.
The result gave Lin Dan his fifth men’s singles world title, extending his record at the time. His previous victories came in 2006, 2007, 2009, and 2011.
The final is often remembered for both Lin’s achievement and Chong Wei’s retirement. A walkover or retirement is not the same as a completed straight-game victory, so the undefeated-game statistic refers to Lin’s matches before the final.