Tennis tours are organized series of professional tennis tournaments held throughout the year, featuring players from around the world. These tours are primarily governed by organizations like the Association of Tennis Professionals (ATP) for men's events and the Women's Tennis Association (WTA) for women's events. Players earn ranking points based on their performance, which helps determine their standing in the sport. The most prestigious events in tennis tours include the Grand Slam tournaments, such as the Australian Open, French Open, Wimbledon, and US Open. In addition to these major competitions, there are various other tournaments categorized by their level, including Masters 1000 and Challenger events, providing opportunities for players to compete and improve their skills.