The United States tops the globe with a score of 12.83, followed by the Czech Republic with a score of 12.76 and Russia with a score of 12.69. On the women's side, the major male tennis nations of Spain and France rank seventh and ninth, respectively. Australia, the world's biggest tennis nation, ranks tenth. Tennis has been popular in the United States since the mid-1800s, but it wasn't until the late 1940s that it became a major sport. Today, it is one of the most popular sports in the country. In terms of revenue, the United States dominates the global tennis market. The annual ATP World Tour season-opening tournament known as the "Rolex Series" for its main sponsor, includes four events held across the United States, Europe, and Australia. It is the most lucrative sports league in the world. As for the Women's Tennis Association (WTA), its annual tour consists of only two events: the Western & Southern Open in Cincinnati and the US Open in New York City. Both the ATP and WTA tours are owned by Global Sports Investments, which also owns the NBA's Memphis Grizzlies and NHL's Nashville Predators. In addition to these five brands, GSV also owns the rights to the Olympic tennis games from 2024. Overall, American athletes have won every single gold medal awarded in tennis at the Olympics.