The Belgian advanced to the German Open semi-finals with a 6-4, 7-6 victory over Russian Svetlana Kuznetsova.
The 20-year-old Belgian easily beat France's Amelie Mauresmo in the final to pick her ninth title of the year.
This year's WTA championships pays the winner $1 million, equalling the largest prize in women's sport.
The second seed dismissed a challenge from rising Serb teenager Ana Ivanovic to reach the fourth round of the Australian Open.
Amelie Mauresmo pummeled Martina Hingis 6-2, 6-2 in the semi-final of the Qatar Open.
The two will meet in the semi-final of the Dubai Open on Friday
In another quarter-final at the Dubai Open, Russian third seed Maria Sharapova beat Switzerland's Martina Hingis.
The Belgian fresh from her victory in Dubai, bids for a Gulf double when she starts as overwhelming favourite at the Qatar Open.
Amelie Mauresmo reached the Dubai Open final after Serbia's Jelena Jankovic retired through injury when trailing 6-2 on Friday.
The rising Serbian star beat Martina Hingis 7-6, 6-2 to reach the semi-final of the WTA Dubai Open.
Top-seed Amelie Mauresmo overpowered compatriot Mary Pierce 6-1, 7-6.
Kim Clijsters bid a teary-eyed farewell to her home fans after losing to France's Amelie Mauresmo in the final of the Diamond Games.
Second seed Kim Clijsters cruised into the semi-finals of the Diamond Games with a 6-2 6-1 victory over Serbia's Ana Ivanovic
The French world No 3 is aiming to take home a diamond studded racket, awarded for three title wins in five years, following her back-to-back victories at the Diamond Games in 2005 and 2006.
Amelie Mauresmo beat Nathalie Dechy 6-3, 6-2 to reach the quarter-finals of the Paris Open.
Hot favourites Russia will take on an under-strength France in the Fed Cup final after both nations completed 5-0 wins in the semis.
Sania Mirza lost her women's singles and doubles matches at the Australia Open on Thursday.
The world number two said she wants to concentrate on the 2005 season.
The Frenchwoman went down to rising Serb Ana Ivanovic 6-3, 7-5 at the Sydney International.
China's Na Li kept the Asian interest alive as she beat ninth seed Dinara Safina 6-2, 6-2.
Mauresmo stayed on course to defend her Australian Open title with a 6-3, 6-1 win over Czech Eva Birnerova in the third round on Friday.
The two players bowed out in the quarter-finals of the Advanta Championships in Philadelphia.
In another match in the WTA Championships, an exhausted Maria Sharapova was beaten by Nadia Petrova.
Justine Henin-Hardenne clinched the year-end number one spot and a place in the final of the WTA Championships when she ended Maria Sharapova's 19-match winning streak.
The world number one withdrew from the Zurich Open with a right shoulder injury.
The Czech teenager beat top seed and world number one Amelie Mauresmo 1-6, 7-5, 7-6 in the Kremlin Cup quarter-finals.
Top seed Amelie Mauresmo joined Russian trio Elena Dementieva, Nadia Petrova and Anna Chakvetadze in the Kremlin Cup quarter-finals on Thursday.
Russian Svetlana Kuznetsova registered a 6-4, 6-0 victory to win the China Open title.
Seven top 20 ranked players have already withdrawn from the event.
The Parisian crowd has adopted the 22-year-old Russian as one of theirs.
Barbora Strycova beat Alize Cornet 6-2, 7-6(4) to put defending champions Czech Republic level at 2-2 against hosts France and send the Fed Cup final into a doubles decider on Sunday.
Amelie Mauresmo was struggling against qualifier Kristina Barrois when rain ruled out play at the US Open.
The Indian has dropped 10 places to 54 in the latest WTA rankings.
List of Wimbledon women's singles champions since 1922.