RESULTS: CIMB KL Open Squash Championships, Kuala Lumpur, Malaysia
 Nicol David (MAS) bt Laura Lengthorn-Massaro (ENG) 9-4, 9-3, 9-4 (28m)
Alison Waters (ENG) bt  Rachael Grinham (AUS) 9-2, 9-4, 7-9, 4-9, 9-2 (65m)
Vanessa Atkinson (NED) bt  Omneya Abdel Kawy (EGY) 9-3, 9-10, 9-5, 8-10, 9-3 (50m)
 Natalie Grinham (NED) bt [Q] Rebecca Chiu (HKG) 9-7, 9-2, 7-9, 9-3 (51m)
England's Alison Waters recorded the best win of her career when she upset Australia's world No3 Rachael Grinham in today's (Thursday) quarter-finals of the CIMB KL Open to earn a shock semi-final berth in the women's WISPA Gold event at the National Squash Centre in the Malaysian capital Kuala Lumpur.
Just a few weeks after becoming the surprise winner of the British National Championship title for the first time, the unseeded 23-year-old from London romped to a two-game lead over her experienced opponent from Queensland.
But third seed Grinham, a former world number one, regained the initiative by taking the next two games to draw level. However, with the match moving into a second hour, Waters upped her game to claim a stunning 9-2, 9-4, 7-9, 4-9, 9-2 victory after 65 minutes.
Waters now faces the toughest opponent in the event - top seed and local star Nicol David. The world number one from Penang cruised into the semi-finals with a 9-4, 9-3, 9-4 win over unseeded opponent Laura Lengthorn-Massaro, also from England.
There was another upset in the lower half of the draw where unseeded Dutch player Vanessa Atkinson secured her second upset in 24 hours by beating Omneya Abdel Kawy, the No8 seed from Egypt, 9-3, 9-10, 9-5, 8-10, 9-3. Atkinson now faces her new Dutch compatriot Natalie Grinham for a place in the final.
Women's semi-final line-up:
 Nicol David (MAS) v Alison Waters (ENG)
 Natalie Grinham (NED) v Vanessa Atkinson (NED)
photo Getty Images
photo Getty Images