World number 10 Sindhu defeated the Korean, who ousted Saina Nehwal at the Denmark Open last week, 21-8 21-12 in just 29 minutes.
Sindhu, who exited the Denmark Open early, rode on her superior smash winners and deft net play to tame the Korean in a one-sided contest at the Stade Pierre de Coubertin here.
In women's doubles, the pair of Jwala Gutta and Ashwini Ponnappa went down fighting against Gebby Ristiyani Imawan and Tiara Rosalia Nuraidah of Indonesia in their opening round match at the Stade Pierre De Coubertin.
The Indian pair started well and had an upper hand in the first game at 17-13 before their opponents won six points on the trot to take the game. But Jwala and Ashwini put that disappointment behind to claim the second game.
The final game, however, was fought keenly but the Indonesian pair relied on their experience to win it and enter the next round in a 50-minute battle.