鄭在成
Lee Yong-dae and Jung Jae-sung didn't start off the year so well with a loss in their home game at the 2012 Korea Open Super Series Premier losing to Cai Yun and Fu Haifeng in three sets, 18–21 21–17 21–19. In German Open, Lee and Jung reached the final but lost to unseeded Chinese pair, Hong Wei and Shen Ye.