Yoo Jin-sun (born July 12, 1962 in Seocheon, Chungcheongnam-do) is a former tennis player from South Korea, who represented his native country as a qualifier at the 1988 Summer Olympics in Seoul.

There he was defeated in the first round by the number twelve seed from Israel, Amos Mansdorf.

The right-hander reached his highest singles ATP-ranking on June 13, 1988, when he became the number 194 of the world.

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