Formally known as the United States Open Tennis Championships the US open in the modern era is based on one of the oldest tennis championships in the world, The US National Championship which started in 1881. The US Open became the fourth and final grand slam of the ATP and WTA tours in 1987. The Main tournament has 5 different events Men and Women’s singles, Men and Women’s doubles and mixed doubles. The biggest matches of the tournament are played on the famous Arthur Ashe Stadium in New York City. Former winners of the tournament include some of the greatest players of all time like Pat Rafter, Roger Federer, Andre Agassi and Pete Sampras. Get your US Open tickets here to see the best tennis players on the planet compete for the US open Grand slam championship.