India’s World No. 21 Dipika Pallikal Karthik entered the quarterfinals of the Oracle NetSuite Open, a PSA Tour event with a 11-9, 11-8, 7-11, 11-8 upset victory over England’s World No. 13 Emily Whitlock at the Bay Club Redwood Shores here.

Pallikal Karthik will next meet Olivia Blatchford of USA.