Former World No. 1 German female tennis player
As of 6-19-2010 no1 is Rafael Nadal. 2015 update: Novak Djokovic is the current No1
The top Tennis player in the 1940's for the Men's side was Jack Kramer. The top Women's player during this time was Molla Mallory.
As he wanted to become world no1 tennis player he wanted to play... So he likes it.
No he is from USA
As of November 2012, it is again Novac Djokovic. Federer held top position for the few months prior