About Karen Krantzcke
Karen Krantzcke (1 February 1946 – 11 April 1977) was an Australian tennis player. She achieved a world top ten singles ranking in 1970. In her short career, she made the quarterfinals or better at each of the four Grand Slam championships in both singles and doubles. She also won the Australian Open in doubles, and assisted Australia to victory in the Federation Cup. At the age of 31, Krantzcke died from a heart attack while jogging in Florida, United States, where she was playing on the Challenger circuit. In response to her untimely death, the WTA instituted the Karen Krantzcke Sportsmanship Award which is still awarded annually to an active WTA Tour player after a vote by fellow tennis pros.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.