The ATP Tour (known as ATP World Tour between January 2009 and December 2018) is the sole worldwide top-tier tennis tour for men organized by the Association of Tennis Professionals founded in 1990 that replaced the earlier dual Grand Prix Circuit and WCT Circuit . The second-tier tour is the ATP Challenger Tour and the third-tier is the ITF Men's World Tennis Tour . The equivalent women's organisation is the WTA Tour .
3-562: The Geneva Open is an ATP Tour (formerly Grand Prix ) affiliated tennis tournament that was held annually from 1980 to 1991 in Geneva , Switzerland on clay courts . In November 2014 the ATP announced that the Düsseldorf tournament would be moved to Geneva where it would be held in 2015 as a 250 tournament. Casper Ruud is the singles record-holder, with three editions won. Mate Pavić
6-527: Is the doubles record-holder with four wins, two with Oliver Marach and one with Nikola Mektić , and one with Marcelo Arévalo . Balázs Taróczy is the only player to win both singles and doubles title the same year. ATP Tour The ATP Tour comprises ATP Masters 1000 , ATP 500 , and ATP 250 and the United Cup . The ATP also oversees the ATP Challenger Tour , a level below
9-884: The ATP Tour, and the ATP Champions Tour for seniors. The Grand Slam tournaments, the Olympic tennis tournament , the Davis Cup , and the entry-level ITF World Tennis Tour do not fall under the purview of the ATP, but are overseen by the International Tennis Federation (ITF) instead and the International Olympic Committee (IOC) for the Olympics. In these events, however, ATP ranking points are awarded, with
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