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.
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.
Tournaments Tournament Also known as City(s) Country Court surface Tier IV in YearsPuerto Rico OpenHonda ClassicSan Juan (1991–1993)Dorado (1990)Puerto Rico, USHard1990–19934KansasAvon Championships of KansasWichita, KSUnited StatesHard19901AlbuquerqueVirginia Slims of AlbuquerqueAlbuquerque, NMUnited StatesHard1990–19912NashvilleVirginia Slims of NashvilleNashville, TNUnited StatesHard1990–19912Spanish OpenInternational Championships of SpainBarcelonaSpainClay19901Birmingham ClassicAegon ClassicBirminghamUnited KingdomGrass1990–19923Brisbane InternationalDanone Hardcourt ChampionshipsBrisbaneAustraliaHard1990–19923Swiss OpenEuropean OpenGeneva (1990–1991)Lucerne (1992)SwitzerlandClay1990–19923IndianapolisVirginia Slims of IndianapolisIndianapolisUnited StatesHard1990–19923MemphisVirginia Slims of OklahomaMemphis, TNUnited StatesHard1990–19923ParisClarins OpenParisFranceClay1990–19923StrasbourgInternationaux de StrasbourgStrasbourgFranceClay1990–19923TokyoSuntory Japan OpenTokyoJapanHard1990–19923Bayonne Whirlpool OpenBayonneFranceCarpet (i)1991–19922Kuala LumpurMalaysian Women's OpenKuala LumpurMalaysiaHard (i)1992–19932TaipeiP&G Taiwan Women's OpenTaipeiTaiwanHard1992–19943
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