Caroline Wozniacki of Denmark (L) and Kim Clijsters of Belgium kiss after their women's singles quarter-finals match at the Australian Open tennis tournament in Melbourne January 24, 2012. [Photo/Agencies]

MELBOURNE - Caroline Wozniacki was dumped out of the quarter-finals of the Australian Open by Kim Clijsters on Tuesday and will lose her world number one position when new rankings are released next week.

The 21-year-old Dane had held the top spot since Oct. 11, 2010, barring a week in February last year, when Clijsters briefly took it from her. Three women, Maria Sharapova, Petra Kvitova and Victoria Azarenka have a chance of finishing the tournament at number one.