India's world No. 21 Dipika Pallikal beat USA's Olivia Blatchford 13-11, 11-6, 11-9 to enter the women's semifinals of the San Francisco Open squash tournament. She has won two matches over seeded players after having beaten fourth-seed Emily Whitlock in round one.She will now play Malaysia's eight-time world champion and No.2 seed Nicol David in the semifinal tomorrow.