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LONDON - JULY 7: Martina Navratilova of Czechoslovakia hits a return against Zina Garrison-Jackson of the United States during the finals of the women's singles at the Wimbledon Lawn Tennis Championships July 7, 1990 at the All England Lawn Tennis and Croquet Club in London, England. (Photo by Focus on Sport/Getty Images)

LONDON - JULY 7:  Martina Navratilova of Czechoslovakia hits a return against Zina Garrison-Jackson of the United States during the finals of the women's singles at the Wimbledon Lawn Tennis Championships July 7, 1990 at the All England Lawn Tennis and Croquet Club in London, England. (Photo by Focus on Sport/Getty Images)