2008 ATP Tour
{'<entity_0>': 'Association of Tennis Professionals', '<entity_1>': '2008 ATP Tour', '<entity_2>': 'ATP Tour', '<entity_3>': 'tennis', '<entity_4>': '2008'}
[['2008 ATP Tour', 'sports season of league or competition', 'ATP Tour'], ['2008 ATP Tour', 'sport', 'tennis'], ['2008 ATP Tour', 'organizer', 'Association of Tennis Professionals'], ['2008 ATP Tour', 'point in time', '2008']]
The <entity_1> was the global elite men's professional <entity_3> circuit organised by the <entity_0> (ATP) for the <entity_4> <entity_3> season. The <entity_2> is the elite tour for professional <entity_3> organized by the <entity_0>. Following is a list of notable players (winners of a main tour title, and/or part of the ATP Rankings top 100 (singles) or top 50 (doubles) for at least one week) who announced their retirement from professional <entity_3>, became inactive (after not playing for more than 52 weeks), or were permanently banned from playing, during the <entity_4> season:
['tennis tour edition']