"PV Sindhu well done. All of us are following you at Rio 2016 with pride. Keep winning. Keep winning India," Banerjee tweeted.
Now the two-time World Championship bronze medallist Sindhu stood just a win away from assuring India an elusive medal.
Sindhu will face World Number-3 Nozomi Okuhara of Japan in the last-four stage.
World number 10 Sindhu, who has a 1-3 win-loss record against Nozomi, has never beaten the Japanese since Asian Youth Under-19 Championship in 2012 and has lost on three consecutive occasions in 2014, 2015 and the last being Asian Team Championship in Hyderabad earlier in February this year.
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