The Amackassin Club Invitation[1] was a men's and women's clay court tennis tournament founded in 1890.
[2] It was played at the Amackassin Club, Yonkers, New York, United States from 1890 to 1939 when it was downgraded from the main worldwide ILTF Circuit.
[3] The same year in September the club staged its first tennis tournament.
In 1890 the club started an invitation tennis tournament featuring a men's singles event that was won by Victor M.
In 1920 and 1921 those editions of the tournament were held in conjunction with the Eastern New York State Clay Court Championships with players assuming both titles Eastern New York State Champion and Amackassin Champion.