 For the 2008 season, which was the last season it was held, the tournament became Tier I for the prize money of $2,500,000.The event then took a two-year break due to the venue hosting the WTA Tour Championship, thus not being played in 2009 or 2010.The tournament returned in 2011 as a Premier Event with the prize money of $721,000 and a 32-competitor singles draw (16-pair doubles draw).