This article needs to be updated. You can help Wikipedia by updating it.(July 2016)
The English used in this article or section may not be easy for everybody to understand. You can help Wikipedia by reading Wikipedia:How to write Simple English pages, then simplifying the article.(August 2014) An editor's reason for this is: some sentences need to be divided; also some complex words.
ATP started in September 1972 by Donald Dell, Jack Kramer, and Cliff Drysdale. Its job is to care for the interests of men's professional tennis. Starting in 1990, the ATP has organized the most important group of tennis competitions for men. In 2009, the organization changed the name of the competitions from "ATP Tour" to "ATP World Tour." ATP is based in London.