BALI, Indonesia - A dozen Sony Ericsson WTA Tour stars who have excelled at the International tournament level this season have assembled in Bali for the inaugural Commonwealth Bank Tournament of Champions.

In Monday's draw ceremony the dynamic dozen was split up into four round robin groups of three, led by the Top 4 seeds - Marion Bartoli, Samantha Stosur, Yanina Wickmayer and Sabine Lisicki.

Bartoli, ranked No.12 in the world this week and a winner of one International title this season at Monterrey, leads the A Group, which also includes Shahar Peer and Magdalena Rybarikova. Peer won back-to-back titles at Guangzhou and Tashkent while Rybarikova won in Birmingham, on grass.

Stosur, ranked No.13 and a winner at Osaka, leads the B Group. Also in that group are María José Martínez Sánchez and Agnes Szavay. Martínez Sánchez won titles at Bogotá and Bastad; Szavay won in Budapest.

Wickmayer, ranked No.18 and a winner at Estoril and Linz, leads the C Group. She is joined there by Fès champion Anabel Medina Garrigues and Seoul champion - and 39-year-old comeback sensation - Kimiko Date Krumm.

Lisicki, ranked No.25 and one of two wildcards in the draw, alongside Date Krumm, leads the D Group. She didn't win an International title this year but was a champion at the Premier stop in Charleston. She is joined by Québec City winner Melinda Czink and Strasbourg champ Aravane Rezai.

The three players in each group will play each other and the top finisher in each group will advance to the semifinals on Saturday. The final is Sunday.

Check out the draws page for the Bali tournament draw.

Depending on their results this week, Bartoli or Stosur could rise to No.10 in the world on the post-Bali rankings. Watch this space for more on the Top 10 race.

Wickmayer, Peer and Martínez Sánchez are the only players who won more than one International title during the season. Wickmayer and Peer both made the semifinals of Luxembourg in the last week of the regular season; if either had gone on to win that event for their third such title, they would have been going for a $1 million bonus in Bali as well.