Heather Blundell was born in Queanbeyan, New South Wales. As Heather McKay, she completely dominated the sport of women's squash in the 1960s and '70s. She lost only two matches in her entire career (in 1960 and 1962), and was unbeaten in competitive squash matches from 1962 through to 1981, when she retired from active open squash. Her first defeat was in the quarterfinal of the New South Wales Championship in 1960 losing to Yvonne West and her second defeat was in the final of the Scottish Open in 1962 losing in straight games to Fran Marshall.