This match-play event has players compete in 36-hole matches each of the four rounds.
Padraig Harrington, Angel Cabrera, Ernie Els, Woody Austin, Justin Rose, Retief Goosen, Rory Sabbatini, Jerry Kelly, Andres Romero, Niclas Fasth and Hunter Mahan qualified for the event through the HSBC Major Championships Ranking.
Anders Hansen and eight-time Order of Merit winner Colin Montgomerie got into the field through the HSBC European Tournaments Ranking, while Henrik Stenson and Soren Hansen qualified thanks to the Order of Merit.
The final spot goes to Paul Casey, the defending champion. Casey rolled through the event last year with his smallest winning margin being 5 and 3. He defeated Mike Weir by that margin in the quarterfinals after drubbing Retief Goosen, 6 and 4, in the first round.
Casey, the 12th seed, then routed Montgomerie, 6 and 5, in the semis before trouncing Shaun Micheel, 10 and 8, in the final. Casey will enter the event as the No. 1 seed this year as defending champion.
Ernie Els, who owns a house just off the course in Wentworth, has won this event six times, including two three-year win streaks. Els won three straight from 1994-96, then again from 2002-04.
The GOLF CHANNEL has coverage of all four rounds.