The 2009 US Open Tennis Championship is underway at the USTA Billie Jean King National Tennis Center in Flushing, New York. The tournament which has started today will last for 14 days from 31st August till 13th September 2009. Online streaming sites such as UStream, Justin.tv and the official US Open website will be broadcasting the event LIVE. You can watch the top tennis players in the World including 5 times defending champion Roger Federer as he competes for one of the biggest prized crown of the year!

The United States Tennis Association in association with IBM and American Express brings the official iPhone app for the 2009 US Open Tennis Championships. Follow the action LIVE during the Open from August 31st to September 13th on your iPhone and iPod touch. Don’t miss the action as the World’s top players compete against each other for one of the biggest prized crown of the year!