World No.9 Sai and the 2015 winner looked much relaxed in the match and did not have to sweat much as she wrapped up the proceedings in 33 minutes to stay on course for her second title. She set up a blockbuster quarter-fil with Sindhu, who got past Japanese Sae Kawakami 21-16, 23-21 in 40 minutes. Top seed and 2016 Olympic champion Caroli Marin also advanced as she defeated Ritupar Das 21-13, 21-11 in 27 minutes. IANS