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Jelena Jankovic’s loss to Marion Bartoli cost her more than a big check at the end of the Australian Open.

The Serbian star will now lose the Sony Ericsson WTA Tour No. 1 ranking to one of three other top players on Monday.

Jankovic had an outside chance of holding onto the top spot after her fourth round defeat, but because Dinara Safina reached the semifinals, Jelena will be ousted after seventeen consecutive weeks.

An Australian Open singles title would guarantee former world number one Serena Williams or newcomers Dinara Safina and Elena Dementieva the number one ranking. However, each of the trio still has a chance to claim the top spot without winning the Grand Slam.

Elena Dementieva
The Russian could become the 19th player since the inception of the Sony Ericsson WTA Tour Computer Ranking System (second Russian, along with Maria Sharapova) was introduced on November 3, 1975.

Dementieva needs to:
- Win the singles title
- Reach the finals if Safina does not also reach the finals

Dinara Safina
Like Dementieva, the Russian could become the 19th player since the inception of the Sony Ericsson WTA Tour Computer Ranking System (second Russian, along with Maria Sharapova) was introduced on November 3, 1975.

Safina needs to:
- Win the singles title
- Reach at least SF and neither Dementieva nor S.Williams advance to the finals

Serena Williams
The American is aiming to return to the World No.1 ranking for the third time in her career. S.Williams has held the World No.1 ranking for 61 weeks (57 weeks: 7/8/02 to 8/10/03 and 4 weeks: 9/8/08 to 10/5/08).

Williams needs to:
- Win the singles title
- Reach the finals if Safina does not also reach the finals

For more Jelena Jankovic to Lose Top Spot; Ranking Race Between Serena Williams, Dinara Safina and Elena Dementieva