The WTA Tier IV tournaments were Women's Tennis Association fourth-level tournaments held from 1990 until the end of the 2008 season. The line-up of events varied over the years, with tournaments being promoted, demoted or cancelled. Some of the tournaments became Tier V events between 1990 and 1992, and later from 2001 to 2005, before being integrated back into Tier IV.^[1]

From 2009 WTA Tour, WTA changed the tournament categories, so that most of the Tier III and Tier IV tournaments from 2008 were in one category, WTA International tournaments.

Events

Tournament	Also known as	City(s)	Country A	Court surface	Tier IV in	Years
Puerto Rico Open	Honda Classic	San Juan (1991–1993) Dorado (1990)	Puerto Rico, USA	Hard	1990–1993	4
Kansas	Avon Championships of Kansas	Wichita, KS	United States	Hard	1990	1
Albuquerque	Virginia Slims of Albuquerque	Albuquerque, NM	United States	Hard	1990–1991	2
Nashville	Virginia Slims of Nashville	Nashville, TN	United States	Hard	1990–1991	2
Birmingham Classic	Aegon Classic	Birmingham	United Kingdom	Grass	1990–1992	3
Brisbane International	Danone Hardcourt Championships	Brisbane	Australia	Hard	1990–1992	3
Swiss Open	European Open	Geneva (1990–1991) Lucerne (1992)	Switzerland	Clay	1990–1992	3
Indianapolis	Virginia Slims of Indianapolis	Indianapolis	United States	Hard	1990–1992	3
Memphis	Virginia Slims of Oklahoma	Memphis, TN	United States	Hard	1990–1992	3
Paris	Clarins Open	Paris	France	Clay	1990–1992	3
Strasbourg	Internationaux de Strasbourg	Strasbourg	France	Clay	1990–1992	3
Tokyo	Suntory Japan Open	Tokyo	Japan	Hard	1990–1992	3
Bayonne	Whirlpool Open	Bayonne	France	Carpet (i)	1991–1992	2
Kuala Lumpur	Malaysian Women's Open	Kuala Lumpur	Malaysia	Hard (i)	1992–1993	2
Taipei	P&G Taiwan Women's Open	Taipei	Taiwan	Hard	1992–1994	3