well it used to be Kim Clijsters but since the Australian open is going on now, well just have to wait. i have high hopes for li na, from china
Sam Smith in 1998 Anne Keothavong in 2008
Rafael Nadal!
In World Rankings for December 2010... Woman - GAO Jun Man - XIAO Han
As far as WTA rankings go, as of June 23, 2008 the highest ranked Belgian woman is Yanina Wickmeyer at #69. She is the only Belgian woman ranked in the top 100.
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.
Caroline Wozniacki.
Novak Djokovic is the top male tennis player on the ATP rankings.
Novak Djokovic
Lleyton Hewitt (currently 34th in the world).
England's tennis no.1 in both men and women is Alex Bogdanovic(Ranked 183) and Anne Keothavong (Ranked 61) But if Great Britain is Concerned Andy Murray(Ranked 4) along with Keothavong(Ranked 61) are the top ranked.
According to Wikipedia (refer to the link, below), many women tennis players shared the honor of being ranked #1 for the years 2005-2007, inclusive.
Jelena Jankovic was born in Belgrade, Serbia.