Borussia Dortmund are chasing Barcelona whizkid Lee Seung-woo.

Although Lee's contract lasts to 2019, it is necessary for him to sign a new deal before August 31 as he is no longer eligible to play for the Under-19s and he must, therefore, agree to a contract with Barcelona B.

"After meeting with the club and listening to the advice of others, I will take the best decision possible," Lee said in a statement collected by the Yonhap agency, before boarding a plane to Spain from Incheon Airport in South Korea.

"If I don't play for Barcelona, then I will choose a team that gives me the best options."