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William Tatem Tilden II (February 10, 1893 - June 5, 1953), often called "Big Bill", was an American tennis player who was the World No. 1 player for 7 years, the last time when he was 38 years old. Born in Philadelphia, Pennsylvania, to a wealthy family, he was a "Junior" at birth but changed his name to "II" when he was in his mid-20s. ©TopFoto