The **ATP Tour**, formerly known as the **ATP World Tour**, is the premier men's professional tennis circuit, organized by the **Association of Tennis Professionals (ATP)**. Founded in 1990, it replaced the earlier Grand Prix Circuit and World Championship Tennis (WCT) to become the sole top-tier tour for men's tennis worldwide[2][3]. The ATP Tour is designed to promote men's professional tennis, overseeing tournaments like the **Grand Slam** events, **ATP Finals**, **ATP 1000**, **ATP 500**, and **ATP 250** events[2]. ## History and Evolution The ATP was established in September 1972 by Donald Dell, Jack Kramer, and Cliff Drysdale to protect the interests of professional tennis players[3][5]. Over the years, the tour has undergone several name changes, with the most recent being a rebranding back to the **ATP Tour** in 2019[3]. The ATP Tour has evolved from its predecessors, incorporating a structured ranking system and a tiered tournament format[2]. ## Key Achievements One of the ATP Tour's notable achievements is the establishment of a consistent global tournament schedule, which has helped increase the popularity of men's tennis. The tour has also played a crucial role in promoting tennis globally, with events in numerous countries and media coverage that reaches millions of viewers worldwide[1][3]. ## Current Status Currently, the ATP Tour continues to be a driving force in men's professional tennis, with ongoing efforts to improve player welfare, enhance fan engagement, and maintain high standards of competition. The tour is supported by a network of governing bodies across different regions, including offices in London, Monaco, the United States, and Australia[3][5]. ## Notable Aspects - **Tournament Structure**: The ATP Tour is structured into several tiers, including Masters events and smaller tournaments, which provide a pathway for players to climb the rankings