Leonard 'Leo' Everett Ware (September 27, 1876 – December 28, 1914) was an American male tennis player of Canadian origin. He won two titles in the men's doubles competition at the U.S. National Championships played at the Newport Casino, and reached the semifinals of the singles four times.Ware graduated from Harvard University in 1899 and represented Harvard in the intercollegiate tennis tournament, winning in the men's doubles in 1896, 1897 and 1898 and in the singles in 1898.He won the Canadian Championships in 1897, beating Edwin P. Fischer in the final, and again in 1898, defeating Malcolm Whitman in the final. In March 1898 he won the inaugural edition of the U.S. National Indoor Tennis Championships, held in Newton Centre, after defeating Holcombe Ward in the final in three straight sets.He died of pneumonia on December 28, 1914.