The United States Open Tennis Championships is a hard court tennis tournament when it was founded? A. 1860 B. 1881 C. 1900 D. 1913 Related Read more articles Previous PostWhere is the headquarter of The International Table Tennis Federation (ITTF)? Next PostThe Australian Open is the first of the four Grand Slam Tennis events held each year, preceding the French Open, Wimbledon and the US Open was founded in? If the aforementioned Answer is Wrong. Leave a Reply with an authentic source.Cancel reply