Warwick Windridge Armstrong (22 May 1879 – 13 July 1947) was an Australiancricketer who played 50 Test matches between 1902 and 1921. An all-rounder, he captained Australia in ten Test matches between 1920 and 1921, and was undefeated, winning eight Tests and drawing two. Armstrong was captain of the 1920–21 Australian team which defeated the touring English 5–0: one of only three teams to win an Ashes series in a whitewash. In a Test career interrupted by the First World War, he scored 2,863 runs at an average of 38.68, including six centuries, and took 87 wickets. He was inducted into the Australian Cricket Hall of Fame in 2000.