Wozniacki top seed for WTA Championships

Caroline Wozniacki will become one of the more unlikely year-end world No 1s if she wins two matches at the WTA championships, which start on Tuesday.

Little considered only 18 months ago and from a nation of only five million people, Wozniacki has climbed steadily to a position from which she should earn the 2010 accolade during the women's season-end tournament.

After the 20-year-old Dane first reached the top earlier this month she said: "This is a really big step for me - it doesn't feel like it's real." Her words tempted some critics to suggest that it isn't.