High Quality Content by WIKIPEDIA articles! The 2010 U.S. Open 9-ball Championship is the 35th annual men`s U.S. Open 9-Ball Championships. The championship is currently held at Chesapeake Conference Center, Chesapeake, Virginia from October 17 to 23, 2010. Finland`s Mika Immonen is the defending champion. Unlike most sports tournaments, women are allowed to enter the main draw.