Right now, Serena Williams is the greatest womans' tennis player in the world because she beat Jelena Jankovic in the finals of the US Open.
Yes.
Novak Djokovic
The womens world cup was held in China in 2007 and not 2008.
As of December 2010, Rafael Nadal is the number 1 ranked male tennis player. As of January 2011, Caroline Wozniacki is the number 1 ranked female tennis player.
Rafael Nadal is currently ranked no.1 men's singles tennis player (2010).
England
The winner was Lionel Messi.
"Yes, Elena Dementieva is a retired Russian tennis player. The highlight of her career was winning the gold medal at the 2008 Bejing Olympics in women's singles tennis. She retired on October 29, 2010, positioned at number 9 in the world."
In World Rankings for December 2010... Woman - GAO Jun Man - XIAO Han
Caroline Wozniacki.
As of October, 2010, World #11. Ittf.com is where you can find info about international table tennis.