ISBN: | 978-5-5141-7612-0 |
High Quality Content by WIKIPEDIA articles! The U.S. Open 9-Ball Championships (often shortened in clear contexts to simply U.S. Open, and sometimes spelled with "US", "9-ball", "Nine-ball", singular "Championship", etc.) is an annual professional pool (pocket billiards) tournament that began in 1976 at Q-Master Billiards in Norfolk, Virginia.