Sunderland have made their second signing in two days by completing a deal for Ji Dong-won.
The 20-year old South Korea international striker has signed a three-year deal, joining the Black Cats from K-League club Chunnam Dragons.
"The boy has been in fantastic form for both club and country as he was one of South Korea's stand-out performers at the Asian Cup, so we are delighted to bring him to Sunderland," he said.
"The Premier League is very different to the K-League so there is hard work ahead.
"But you just have to look at players like Park Ji-sung Park and Lee Chung-yong to see how well Korean players are adapting to its pace and physicality."