(LEAD) S. Korea blank Costa Rica 2-0 in Bento's coaching debut
(ATTN: ADDS details throughout)
By Joo Kyung-don
GOYANG, South Korea, Sept. 7 (Yonhap) -- South Korea defeated Costa Rica 2-0 in a men's football friendly match on Friday, giving their new coach Paulo Bento a victory in his debut before a sellout hom