Kim Min-jung
At the 2012 Summer Olympics, Ha and her partner Kim Min-jung, along with Jung Kyung-eun and Kim Ha-na of South Korea, Wang Xiaoli and Yu Yang of China, and Meiliana Jauhari and Greysia Polii of Indonesia were disqualified from the competition for "not using one's best efforts to win a match" and "conducting oneself in a manner that is clearly abusive or detrimental to the sport" following matches the previous evening during which they were accused of trying to lose in order to manipulate the draw. Ha and her partner Kim Min-jung played against Indonesia's Meiliana Jauhari and Greysia Polii. It is suspected that the Koreans emulated China so to avoid playing against another Korean team in the semi-finals; the Korean head coach Sung Han-kook said "Because they don't want to play the semi-final against each other, so we did the same. We didn't want to play the South Korean team again". South Korea filed an appeal to the case, but it was rejected by the Badminton World Federation.