Tournament of Champions: GB's Alison Waters beats Nicol David

England's Alison Waters causes an upset after beating world number one Nicol David of Malaysia in the quarter-finals of squash's Tournament of Champions in New York.

World number five Waters had only beaten David once in her previous 24 attempts but stunned the Commonwealth champion to win 3-1.

Waters will play Nour El Sharbini of Egypt in the semi-finals on Thursday, with compatriot Laura Massaro taking on another Egyptian, Raneem El Welily, in the other semi-final.

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