(CNN) -- Samantha Stosur stopped Caroline Wozniacki from clinching the year-end women's No. 1 tennis ranking with a shock 6-4 6-3 victory at the WTA Championships in Qatar on Wednesday night. 

The Australian romped to her second straight victory in the Maroon Group, following her revenge win over French Open champion Francesca Schiavone on Tuesday. 

The Roland Garros runner-up's kick serve was a potent weapon against Wozniacki, with the triumph giving the 26-year-old every chance of reaching the semifinals ahead of her final group match against Russia's Elena Dementieva on Thursday. 

It was her second victory over a top-ranked player this year, having beaten Serena Williams on the way to reaching the final in Paris. 

The fifth seed fired 26 winners to Wozniacki's 14, and could afford to serve two double-faults in the deciding game before the Dane returned a backhand long on her first match-point. 

Wozniacki, who thrashed seventh seed Dementieva on Tuesday, will next take on Italy's Schiavone on Thursday. 

Kim Clijsters, who won the $4.5 million season-ending event in 2002 and 2003, earlier triumphed in her opening White Group match 6-2 6-3 against fellow former No. 1 Jelena Jankovic despite serving 10 double-faults. 

The Belgian, returning to action after having a mole cut off her foot, broke Jankovic to love in the first game of the match and then again in the seventh. 

The three-time U.S. Open champion was less impressive in the second set but had enough to see off the Serbian, who is struggling with illness in the oppressive heat in Doha.  QUESTIONS:

Q1:
1. How is Samantha Stosur's win over Francesca Schiavone characterized?
2. What is the description of Samantha Stosur's win over Francesca Schiavone?
3. What did Stosur's win against Schiavone represent?
Q2:
1. Is it true or false that the match between Stosur and Wozniacki happened Friday morning?
2. True or False: Stosur beat Wozniacki on a Friday morning.
3. Stosur bested Wozniacki on a Friday morning: true or false?
Q3:
1. When did the match between Stosur and Wozniacki take place?
2. When did the match where Stosur bested Wozniacki occur?
3. When did Stosur and Wozniacki play against each other?
Q4:
1. How old is Samantha Stosur?
2. What is Samantha Stosur's age?
3. What is the age of tennis player Samantha Stosur?
Q5:
1. Was Stosur's victory in Qatar expected?
2. Did everyone expect Stosur to win in Qatar?
3. Was Stosur the favorite to win in Qatar?
Q6:
1. Serena Williams won against Stosur: true or false?
2. Is it true or false that Serena Williams beat Samantha Stosur?
3. True or false: American star Serena Williams bested Samantha Stosur.
Q7:
1. How much money did Kim Clijsters win in the season-ending event?
2. How much was Kim Clijsters prize for winning the season-ending event?
3. What sum did Kim Clijsters win in the season-sending event?
Q8:
1. When did Kim Clijsters win her season-ending prize?
2. When did Kim Clijsters win her 4.5 million dollar prize?
3. In what year was Kim Clijsters awarded with $4.5 million?
Q9:
1. What is Kim Clijsters nationality?
2. Where does Kim Clijsters come from?
3. Where is Kim Clijsters originally from?
Q10:
1. What blemish did Kim Clijsters have removed?
2. What did Kim Clijsters have removed in an operation?
3. What did Kim Clijsters have taken off of her body?
Q11:
1. Where does Jankovic come from?
2. What is Jankovic's nationality?
3. What country does Jankovic originate from?
Q12:
1. Is Jankovic doing well in the Doha heat?
2. Is Jankovic in good health while in Doha?
3. Has the Doha climate been easy on Jankovic's health?
Q13:
1. Why has Jankovic been ill?
2. What is the cause of Jankovic's illness?
3. Why has Jankovic been feeling under the weather?
Q14:
1. Did Wozniacki clinch the women's top rank?
2. Did Wozniacki reach the women's no. 1 tennis ranking?
3. Was Wozniacki ranked no. 1 in the women's year end tennis ranking?
Q15:
1. When did Stosur prevent Wozniacki from clinching the top rank?
2. What games prevented Wozniacki from reaching the women's top rank?
3. During what games did Wozniacki lose her chance at claiming the women's top rank?
Q16:
1. What championship did Francesca Schiavone win?
2. What tournament is Schiavone the champion of?
3. What championship did Francesca Schiavone recently claim?
Q17:
1. Who did Stosur play against in her final group match?
2. Who was Stosur's opponent in her final group match?
3. Stosur played opposite of whom in her final group match?
Q18:
1. Elena Dementieva is Swedish: true or false?
2. Elena Dementieva hails from Sweden: true or false?
3. True or false: Elena Dementieva is not Russian.
Q19:
1. Where is Elena Dementieva from?
2. What country does Elena Dementieva come from?
3. Elena Dementieva is a national of what country?
