Möregårdh took a 1–0 lead in the first set before the 44th-ranked South Korean tied it at 1–1. The Swede then comfortably won the third and fourth sets and took the match 3–1.
Möregårdh next meets the 39th-ranked Indian Manav Thakkar at lunchtime on Wednesday.
The World Cup in Macau begins with 16 groups of three players each. The group winners then advance to the round of 16.
