Robert Heist is an Illinois attorney who currently serves as the president and principal attorney at the law firm R. Connor & Associates, P.C. During his free time in Illinois, attorney Robert Heist enjoys playing tennis. The Women's Tennis Association (WTA) and the Association of Tennis Professionals (ATP) rank professional women and men tennis players each week. Currently, the world's number one women's tennis player is Ashleigh Barty from Australia, and the world's No.1 men's tennis player is Serbian Novak Djokovic. Throughout his career, Djokovic has been the world's number one men's tennis player for 363 weeks, which is the longest any professional men's tennis player has held this position. In women's tennis, German Steffi Graf's record of holding the world's number one women's tennis position for 377 weeks has been in place for over 25 years. According to current WTA and ATP rankings, no professional women's or men's tennis player is likely to break Graf's or Djokovic's record any time soon, given the stiff competition in the sport currently. To give you an example, Roger Federer has held the men's world No.1 position for 310 weeks, which is the second-longest time a men's tennis player has held the position. For him to break Djokovic's current record of 363 weeks, he would have to be world number one consecutively for at least one year and two weeks, which is next to impossible.