Federer of course!
Cliff Drysdale?
hes #1
3, it is the highest ranking.
Amelie Mauresmo is a former professional tennis player that won two Grand Slams singles titles, one at the Australian Open and the other one at Wimbledon.
Fernando Verdasco is best known as a tennis player. He is from Spain and was born in Madrid. So far he has reached world number 7 as his highest ranking.
Althea Gibson.
Women are not ranked by the ATP, but by the WTA (Women's Tennis Association). The current number one in singles is Victoria Azarenka, and in doubles it is Cara Black.
Rafael Nadal is currently ranked no.1 men's singles tennis player (2010).
Rohan Bopanna is a professional Indian tennis player, currenly [2011] ranked #2 in India, though he is probably a better doubles than singles player internationally, having reached an ATP doubles ranking of #56.
the current ranking system sclculats how many points a player earns over a 12-months period
Your level can go on indefinitely. Your level can go past 2000, and the line will go off of the chart.
Tatiana Golovin started playing tennis as a pro in 2002. She is known ofr her forehand shot and the highest ranking in the world for her has been 12th.