Saina took just 21 minutes to beat Rachael while Kidambi Srikanth entered the third round with a 21-15 21-10 win over compatriot Ajay Jayaram in 25 minutes.
Ashwini and Sikki lost the match 22-24, 12-21 in 39 minutes, thus leaving Lakshya Sen and reigning world champion PV Sindhu as the only Indians remaining in the Super 1000 tournament.