Roger Federer became only the second player after Pete Sampras to receive the accolade for the fourth successive year.
The return of Justine Henin has added an intriguing twist to an Australian Open women's tournament overflowing with talent and mystery.
Justine Henin began the defence of her Eastbourne International title in fine style on Wednesday, beating Poland's Agnieszka Radwanska 6-4, 6-1 and looking every inch a grasscourt player.
Marion Bartoli stunned top seed Justine Henin to reach the Wimbledon final on Friday, beating the world number one 1-6 7-5 6-1.
Serena Williams fought off two match points on her way to an epic 0-6 7-5 6-3 comeback win over world number one Justine Henin to claim her fourth Sony Ericsson title on Saturday.
Belgians Kim Clijsters and Justine Henin pounded their way into the fourth round of the Sony Ericsson Open on Sunday but Martina Hingis fell to a Polish teenager
Justine Henin knocked out Swiss Patty Schnyder 3-6, 6-4, 7-5 to reach the Qatar Open semi-finals.
Martina Hingis has been drawn to play Justine Henin-Hardenne in the first round of the Sydney International.
The Belgian clinched the year-end number one spot when she beat the 19-year-old Russian in the semi-finals of the WTA Championships.
Justine Henin opened the defence of her French Open crown with a battling 6-4, 6-3 win over 20-year-old Russian Elena Vesnina on Sunday.
Kim Clijsters survived two match points before winning her eagerly awaited rematch with fellow Belgian Justine Henin 6-3, 4-6, 7-6 in the final of the Brisbane International on Saturday.
Justine Henin-Hardenne soaked up the full force of Svetlana Kuznetsova's armoury to stay in the hunt for a second French Open crown.
The Belgian claimed her second successive claycourt title when she beat Russian Svetlana Kuznetsova in the final of the Warsaw WTA event.
Reader Anu Dubey sent us a picture of Justine Henin from Doha.
Justine Henin lost her drive for success after reconciling with her estranged family, her coach said following her decision to retire.
But defending champion, Andre Agassi at 33 years is still the man to beat.
Justine Henin remained on course for a successful defence of her WTA Championships crown when she secured her place in the final with a spectacular win over Ana Ivanovic.
Wimbledon champion Amelie Mauresmo suffered a surprise loss to unseeded Ukrainian Julia Vakulenko at the German Open on Friday, as world number one Justine Henin moved smoothly into the quarter-finals.
World number one Justine Henin-Hardenne is separating from her husband and plans to return to the women's tennis circuit.
Amelie Mauresmo reached the Dubai Open final after Serbia's Jelena Jankovic retired through injury when trailing 6-2 on Friday.
Henin-Hardenne finished as year-end number one for a second time after winning the Tour Championships in Madrid in November.
Henin-Hardenne out-hit fellow-Belgian Kim Clijsters in the first semi-final, while Mauresmo beat Maria Sharapova.
Italy were handed Fed Cup title when Belgium's Justine Henin-Hardenne pulled out due to injury in the deciding doubles match.
Saturday's Australian Open showdown between Serena Williams and Justine Henin is more than a dream final between defending champion and comeback queen.
Justine Henin-Hardenne fought from a match point down to beat Svetlana Kuznetsova and set up a clash with Maria Sharapova
The Belgian former world number one takes a break from tennis to recover from fatigue.
The past, present and future of women's tennis will all come together at the Australian Open on Thursday when Serena Williams and Justine Henin square off against Chinese opponents for a place in the final.
Politics must be kept out of sport at this year's Olympics if the Beijing Games are to be a success, the world number one said.
A despondent Serena Williams grudgingly faced reporters after her 7-6 6-1 defeat to top seed Justine Henin in Tuesday's quarter-finals of the U.S. Open, tears staining her cheeks after the bitter result.
Unseeded Safarova will take on Russian Nadia Petrova, who beat holder Amelie Mauresmo of France in the other semi-final.
Justine Henin was supposed to ride into Roland Garros, scene of four stunning triumphs before her retirement, and gallop away with another Grand Slam crown. The problem was she did not quite believe it would happen herself.
Justine Henin, who has been through hard times lately, said on Friday she was delighted to be back in Paris where she will chase a third consecutive crown at the French Open starting on Sunday.
Indian tennis star Sania Mirza will face former World No1 Justine Henin in her first round match of the Australian Open in Melbourne on Monday.
The world number three will play in the final against Italy in September despite an initial threat from her coach that she would boycott the squad.
A list of high-profile tennis players and other sportspeople who called time on their careers at a young age.