The situation in the Red Group of the WTA Championships is dramatic, as it’s very complicated to calculate who will pass the round-robin phase and reach the semifinals. Our reader, Daniel Bellin, a 61-year-old retired tennis fan from Princeville, Kaua'i Hawai'i, currently living in Bucharest, made a mathematical prediction for us.

Agnieszka Radwanska's victory over Vera Zvonereva sets up a probable 3-way tie between her, Zvonareva and Caroline Wozniacki. Petra Kvitova will probably beat Radwanska. If Kvitova wins in straight sets, then all three of the remaining Reds are 1-2 in matches and 3-5 in sets. Zvonareva beat Wozniacki, but Wozniacki beat Radwanska who beat Zvonareva so there is perfect symmetry there. Read more »

In a clash of two 21-year-olds, one a reigning Wimbledon champion and one a definite world No.1, it was the Grand Slam titlists Petra Kvitova who absolutely outplayed her opponent Caroline Wozniacki and is now 2-0 in the round-robin phase of the WTA Championships.

The world No.3 Kvitova faced no break points and solidly marched through the match without ever having her game endangered. In the very beginning of the match the Czech broke Wozniacki's serve and steadily went on to win the set 6-4. She started the second set in a similar fashion and soon found herself leading 4-0 and winning the match 6-4 6-2.

In her first match of the WTA Championships Kvitova, the debutante at the tournament, defeated Vera Zvonareva 6-2 6-4. (photo: © Neal Trousdale)

Despite losing her last match at the TEB BNP Paribas WTA Championships, by virtue of Maria Sharapova's withdrawal, Caroline Wozniacki secured the year-end No.1 ranking already during the round-robin phase of the tournament. Except for a brief No.2 position for a week, when Kim Clijsters overtook her ranking, Wozniacki has been the world No.1 women's tennis player during the entire year. Additionally, last year she also finished No.1, which makes her only the eighth woman in history to achieve the feat in two successive years. Read more »

Vera Zvonareva worked her way to the victory over Caroline Wozniacki in the last match of the second day of the WTA Championships which finished close to midnight local time. Despite the loss, Wozniacki is now certain to stay No.1 when the year-end rankings are released, as Maria Sharapova withdrew from the tournament.

Zvonareva raced to a 4-0 lead and soon after to victory in the first set by taking the last, eighth game of the set to love. Zvonareva hit 18 winners to Wozniacki's only three, and nine unforced errors to Wozniacki's five. Read more »

In front of the full stands at the WTA Championships in Istanbul, Poland's Agnieszka Radwanska looked to be on a good way to continue her amazing fall season in the Red Group match against world No.1 Caroline Wozniacki, especially after fending off set points in the first set to level at 5-5 and winning the following game on Wozniacki's serve to love before taking the set 7-5.

The Pole started the second set with a break, but Wozniacki broke back, and even though Radwanska took her opponent's serve once again for a 2-1 lead in the second set, Wozniacki won four games in a row and forced the decider in which she was in control until 4-2. Radwanska then staged a comeback for 4-all, but the Polish-speaking Dane eventually won the high-quality match 5-7 6-2 6-4. Read more »