World number two Saina defeated Belaetrix 21-16 21-11 in a 34-minute match at the National Indoor Arena here. The 22-year-old will next take on sixth seed Chinese Shixian Wang tomorrow.

Rising Indian shuttler P V Sindhu, however, crashed out after suffering a straight-game defeat to fourth seed Juliane Schenk of German in the prequarterfinals of the USD 400,000 Super series premier tournament.