Ryu Seung Min seems to have trouble with Chinese penholders. He did win an important Olympic gold against Wang Hao but I believe that was his only victory against Wang Hao out of 10+ encounters. Ma Lin no doubt has a winning record against Ryu. At the end of Ryu's career, he faced Xu Xin and almost didn't know how to play TT. In this match, Ryu was outplayed by Ko, another Chinese penholder.