Frederick Beasley Alexander (August 14, 1880 – March 3, 1969) was an American tennis player in the early 20th century.

In 1908, Alexander became the first foreigner to win the singles title at the Australasian/Australian Championships, the amateur precursor to the Australian Open.

In the singles, Alexander reached the all comers final in 1908, beating William Clothier, then losing to Beals Wright in straight sets.

[2] He competed in the U.S. Davis Cup team in 1908, which lost the final against Australia at the Albert Ground.

[3] In 1915, he wrote How to Play Lawn Tennis, part of the Spalding's athletic library series.