The current number 1 male tennis player is Rafael Nadal followed by Rodger Federer and Stan Wawrinka For the womens, Serena Williams is currently ranked World No. 1
Justine Henin retired so now it's Caroline Wozniacki
Justine Henin, simple and short amswer!
currently Roger Federer is the world's number one men's tennis player, followed by Nadal and Djokovic
Pete Sampras, a professional tennis player, was ranked as the world's number 1 tennis player in 1993. He held that position for nineteen consecutive weeks.
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.