High Quality Content by WIKIPEDIA articles! The WTA Tour is the elite tour for professional women`s tennis organised by the Women`s Tennis Association (WTA). The WTA Tour includes the four Grand Slam tournaments, the WTA Tour Championships and the WTA Tier I, Tier II, Tier III, Tier IV and Tier V events. ITF tournaments are not part of the WTA Tour, although they award points for the WTA World Ranking.