 In his first match against his former club, Seongnam Ilhwa Chunma, on 15 May 2011, Jung sung-ryong gave away a penalty, leading his former teammate Saša Ognenovski to successfully convert the penalty to make it 1–0 before Suwon Samsung Bluewings equalised, resulting in a 1–1 draw.He then kept three clean sheets between 6 August 2011 and 20 August 2011.Having the side reached the Korean FA Cup final, they lost 1–0 against his former club, Seongnam Ilhwa Chunma.