The line-up of events varied over the years, with tournaments being promoted, demoted or cancelled.
[4] The 2001 WTA Tour consisted of 63 tournaments of which 8 were categorized as Tier V. These were tournaments approved by the WTA Tour with a minimum prize money of $110,000.
The 2003 WTA Tour consisted of 59 tournaments of which 6 were categorized as Tier V. These were tournaments approved by the WTA Tour with a minimum prize money of $110,000.
[5] The 2004 WTA Tour consisted of 60 tournaments of which 8 were categorized as Tier V. These were tournaments approved by the WTA Tour with a minimum prize money of $110,000.
The 2005 WTA Tour consisted of 63 tournaments of which 2 were categorized as Tier V. These were tournaments approved by the WTA Tour with a minimum prize money of $110,000.