Alison Waters focused on British title defence
Hertfordshire-based squash player Alison Waters tells BBC London she is determined to win her fifth British national title in Manchester this week.
The 30-year-old, who is the defending champion, is ranked number five in the world.
Waters won two medals at the Commonwealth Games last year and reached the final of the Tournament of Champions in New York last month, having beaten eight-time women's world champion Nicol David in the quarter-finals.
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