|Men's pro tennis|
The ATP Tour (known as the ATP World Tour from January 2009 until December 2018) is a worldwide top-tier tennis tour for men organized by the Association of Tennis Professionals. The second-tier tour is the ATP Challenger Tour and the third-tier is ITF Men's Circuit.
ATP Tour tournaments
The ATP Tour comprises ATP Masters 1000, ATP 500, and ATP 250. The ATP also oversees the ATP Challenger Tour, a level below the ATP Tour, and the ATP Champions Tour for seniors. Grand Slam tournaments, a small portion of the Olympic tennis tournament, the Davis Cup, and the introductory level Futures tournaments do not fall under the auspices of the ATP, but are overseen by the ITF instead and the International Olympic Committee (IOC) for the Olympics. In these events, however, ATP ranking points are awarded, with the exception of the Olympics. The four-week ITF Satellite tournaments were discontinued in 2007.Players and doubles teams with the most ranking points (collected during the calendar year) play in the season-ending ATP Finals, which, from 2000–2008, was run jointly with the International Tennis Federation (ITF). The details of the professional tennis tour are:
|Event||Number||Total prize money (USD)||Winner's ranking points||Governing body|
|Grand Slam||4||See individual articles||2,000||ITF|
|ATP Finals||1||4,450,000||1,100–1,500||ATP (2009–present)|
|ATP Masters 1000||9||2,450,000 to 3,645,000||1000||ATP|
|ATP 500||13||755,000 to 2,100,000||500||ATP|
|ATP 250||39||416,000 to 1,024,000||250||ATP|
|ATP Challenger Tour||178||40,000 to 220,000||80 to 125||ATP|
|ITF Men's Circuit||534||10,000 and 25,000||18 to 35||ITF|
|Olympics||1||See individual articles||0||IOC|
ATP publishes weekly rankings of professional players.
†Change since previous week's rankings
‡Change since previous week's rankings