1981
The longest unbeaten run in squash is 19 years, achieved by Heather McKay (Australia) from 1962 to 1981.
McKay lost just two matches in her entire career: against Yvonne West in the 1960 New South Wales Championship, and against Fran Marshall in the 1962 Scottish Open final. McKay went on to win 16 consecutive British Open titles – the most prestigious squash tournament of that era. She also claimed the inaugural women’s World Open title in 1979.
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