Nicol David (MAS) bt Laura Lengthorn-Massaro (ENG) 3-9, 9-7, 9-4, 9-5 (68m)
 Natalie Grainger (USA) bt  Vanessa Atkinson (NED) 7-9, 2-9, 9-1, 9-6, 9-6 (53m)
Omneya Abdel Kawy (EGY) bt  Rachael Grinham (AUS) 4-9, 9-3, 10-8, 9-6 (46m)
 Natalie Grinham (AUS) bt  Tania Bailey (ENG) 9-6, 9-5, 9-2 (35m)
Egypt's unseeded Omneya Abdel Kawy continued her giant-killing run in the Women's Marsh Apawamis Open by upsetting Australia's world champion Rachael Grinham in the quarter-finals of the first WISPA World Tour Gold squash event of the year at the Apawamis Club in Rye in the US state of New York.
Just 24 hours after despatching seventh seed Jenny Duncalf in the first round, the 22-year-old from Cairo recovered from a game down to overcome fellow Cairo-based Grinham, the No3 seed, 4-9, 9-3, 10-8, 9-6 in 46 minutes.
Kawy now goes on to face her opponent's younger sister Natalie Grinham, the second seed who defeated England's fifth seed Tania Bailey 9-6, 9-5, 9-2.
England's unseeded Laura Lengthorn-Massaro, who also pulled off a first round upset to reach the quarter-finals, took the first game against event favourite Nicol David - but the world number one from Malaysia came back strongly to win 3-9, 9-7, 9-4, 9-5.
David will now face US champion Natalie Grainger for a place in the final. The fourth seed squandered two games against Dutch opponent Vanessa Atkinson before coming back to beat the former world champion 7-9, 2-9, 9-1, 9-6, 9-6.
 Nicol David (MAS) v  Natalie Grainger (USA)
 Natalie Grinham (AUS) v Omneya Abdel Kawy (EGY)