Today, tennis is a global sport played by millions of people of all ages. It is governed by the International Tennis Federation (ITF), which oversees the rules and regulations of the game. The sport boasts a rich tradition of legendary players, including Rod Laver, Bjorn Borg, Martina Navratilova, Steffi Graf, Pete Sampras, Serena Williams, Roger Federer, Rafael Nadal, and Novak Djokovic, who have all left indelible marks on the game.