The purpose of the Porsche Race to the Championships is to determine the eight singles players and four doubles teams that will contest the WTA Tour’s season-ending Championships presented by Porsche at STAPLES Center in Los Angeles, 5-10 November 2003. The tournament is an eight-player round robin singles tournament and four-team single elimination doubles tournament.
Unlike the WTA Tour rankings, which are based on a rolling, 52-week system – using a player’s best 17 results for singles and 11 for doubles over the past 12 months – the Porsche Race to the Championships starts at the beginning of the season, with all players on zero points.
Points earned from all WTA Tour events played (round and quality points) are added to produce the separate weekly Singles and Doubles Team standings.
Originally posted by Leena Ugh... I didn't even know the WTA copied the race system from the ATP. Another way to confuse fans. Hooray.
The WTA uses that system longer than the ATP - an instrument to identify the qualifiers for seasonending WTA Masters. So if anything, the ATP copied the system from WTA. (Although it's NOT exactly the same - ATP has no quality points in its system)