Venus and Serena Williams will team up to play doubles at the Australian Open here in January, organisers said today. The Americans have not played doubles at the Australian Open since they won the title for the second time in three years in 2003. They played their first doubles match together in four years at this year’s Wimbledon before withdrawing in the second round because of injury.Organisers said because injuries have sidelined them from playing in doubles events for so long they now have a nominal ranking of 9999. Australian Open tournament director Craig Tiley said their decision to play was great news.