The Thai held a 6-4 lead initially that swelled to 10-5 as she bagged four consecutive points. Ratchanok employed her trademark deceptive shots and Saina had no answer to them. She was not good at net-play and movement, too.
This allowed Ratchanok to snatch eight points on the trot to hold an 18-5 lead and later win 21-9. She continued the momentum in the second game and dominated Saina from the outset. A 4-0 lead at the beginning meant Saina always trailed her. Ratchanok stamped her authority to race to an 11-5 lead at the break.
Saina played a bit better after the break. She collected 10 points - the same as Ratchanok - after the break. But there was not stopping the three-time former world junior champion Ratchanok as she pocketed the second game 21-15 and entered the semi-final.