2009 ATP Challenger Tour
{'<entity_0>': '2009 ATP Challenger Tour', '<entity_1>': 'ATP Challenger Tour'}
[['2009 ATP Challenger Tour', 'sports season of league or competition', 'ATP Challenger Tour']]
The <entity_0> calendar comprised 20 top tier <entity_1> tournaments, and 142 regular series tournaments, with prize money ranging from $25,000 up to $150,000. These tables present the number of singles (S) and doubles (D) titles won by each player and each nation during the season, within all the tournament categories of the <entity_0>: the <entity_1> tournaments, and the regular series tournaments.
['tennis tour edition']