1. The Williams sisters have both been ranked No. 1 in the world in tennis.
2. The sisters both have 43 singles tennis titles.
3. Serena and Venus have won a whopping 13 Grand Slam titles together.
4. At the tender age of 4, Serena won her first tournament.
5. The sisters were also featured in an episode of The Simpsons called "Tennis the menace"
6. Venus studied fashion at the Art Institute of Fort Lauderdale.
7. Since 1998 Venus and Serena have played against each other a total of 23 times, with Serena winning 13 of those matches
The pair will be in South Africa to promote tennis in Africa and to inspire young black females, we couldn't think of anyone better than the most successful ambassadors and icons of tennis.