The world number 104 bounced back after losing the opening game against 40th-ranked Chen from Chinese Taipei to win 10-12, 11-8, 11-7, 11-7 in a round-of-64 match
Manika returned to beat 94th-ranked Tin-Tin Ho of Britain 4-0 in her singles opener while Sutirtha made a strong impression on her Olympics debut with a come from behind 4-3 win against 78th-ranked Linda Bergstrom of Sweden.