Two-time Olympic medallist PV Sindhu hardly broke any sweat but HS Prannoy had to toil hard as the two Indian shuttlers progressed to the women’s and men’s singles quarter-finals of the Syed Modi International Super 300 tournament here on Thursday.

Top seed Sindhu took just 33 minutes to get the better of American Lauren Lam 21-16, 21-13 in her second-round match, while fifth seed Prannoy staved off a stiff challenge from compatriot Priyanshu Rajawat before prevailing 21-11, 16-21, 21-18 at the BBD indoor stadium here.