The Association of Tennis Professionals (ATP) Challenger Series is the secondary professional tennis circuit organized by the ATP.
The 2008 ATP Challenger Series calendar comprised 176 tournaments, with prize money ranging from $25,000 up to $150,000.
[1] The table below shows the 2008 ATP Challenger Series schedule.
+H: Any Challenger or Futures providing hospitality shall receive the points of the next highest prize money level in that category$.
Monies shown for Challengers and Futures are on-site prize amounts.