While Sameer dispatched Indonesia's Ginting Anthony, seeded third, 21-17 21-13 in a 37-minute match, Lalita was given a walk over against Estonia's Kati Tolmoff and the Indian will take on Germany's Olga Konon next.
At the adjacent court, Ratchanok continued giving
badminton lessons to Sindhu, who seemed completely clueless about her strokes.
Ratchanok played with soft hands, using her drops and deceptive returns to great affect, while Sindhu committed far too many unforced errors to pose any kind of challenge to her opponent.
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The change of sides did not change Sindhu's fate as she continued to make unforced errors and Ratchanok once again went into the break 11-4.
Sindhu failed to decipher Ratchanok's game and also faltered with her strokes as the Thai reached 15-5 once again. Finally, a net error gave Ratchanok 13 match points. Sindhu then dictated terms in a rally to save a match point but Ratchanok closed the issue in the next chance with a smash.