Sept. 6
1920 — Jack Dempsey knocks out Billy Miske in the third round to retain the world heavyweight title. It's the first radio broadcast of a prizefight.
1920 — Bill Tilden wins his first of seven U.S. Open men's singles titles, defeating Bill Johnston, 6-1, 1-6, 7-5, 5-7, 6-3, at the West Side Tennis Club in Forest Hills, N.Y.
1941 — Bobby Riggs beats Frank Kovacs in four sets to win the men's title in the U.S. Lawn Tennis Association championships. Sarah Palfrey Cooke wins the women's title with a 6-2, 6-2 victory over Pauline Betz.
1948 — The United States sweeps Australia 5-0 to retain the Davis Cup title.