Althea Louise Brough Clapp (née Brough; March 11, 1923 – February 3, 2014) was an American tennis player. In her career between 1939 and 1959, she won six Grand Slam titles in singles as well as numerous doubles and mixed-doubles titles. At the end of the 1955 tennis season, Lance Tingay of the London ''Daily Telegraph'' ranked her world No. 1 for the year.
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