Ìdíje Open Amẹ́ríkà[a][b] ni ìdíje ọdọọdún tennis tí wọ́n dásílẹ̀ ní 1881 tí wọ́n ṣì ún gbá lọ́rí pápá kọnkéré nítagbangba[c] ní USTA Billie Jean King National Tennis Center láàdúgbò Flushing Meadows – Corona Park, ìlú New York City ní orílẹ̀-èdè Amẹ́ríkà. Key Key United States Amateur Tennis Championships U.S. Pro Tennis Championships a Known as the U.S. National Championships during the Amateur Era. b The tournament entered the Open Era with the 1968 edition, allowing professional players to compete alongside amateurs. c The US Open specifically uses DecoTurf hard courts, categorized as a "Medium" speed surface by the International Tennis Federation (ITF). d Each year is linked to an article about that particular event's draw. e The 1917 U.S. National Championships, taking place during World War I, were held as a National Patriotic Tournament awarding no prize to the winner. f In 1970, 1971 and 1972 tiebreaks were "five point tiebreaks". g All four Amateur Era wins by players from the United Kingdom of Great Britain and Ireland (1801–1922). h Czechoslovakia (TCH, 1918–1992), evolved into Czech Republic (CZE, 1992–present) and Slovakia (SVK, 1992–present). i One win by a player from West Germany (FRG, 1949–1990).