2018 WTA Tour
The 2018 WTA Tour was the elite professional tennis circuit organised by the Women's Tennis Association (WTA) for the 2018 tennis season. The 2018 WTA Tour calendar comprises the Grand Slam tournaments, supervised by the International Tennis Federation (ITF); the WTA Premier tournaments (Premier Mandatory, Premier 5, and regular Premier); the WTA International tournaments; the Fed Cup (organized by the ITF) and the year-end championships (the WTA Tour Championships and the WTA Elite Trophy). Also included in the 2018 calendar is the Hopman Cup, which is organized by the ITF and does not distribute ranking  points. Schedule. This is the complete schedule of events on the 2018 calendar, with player progression documented from the quarterfinals stage. Statistical information. These tables present the number of singles (S), doubles (D), and mixed doubles (X) titles won by each player and each nation during the season, within all the tournament categories of the 2018 WTA Tour: the Grand Slam tournaments, the year-end championships (the WTA Tour Championships and the WTA Elite Trophy), the WTA Premier tournaments (Premier Mandatory, Premier 5, and regular Premier), and the WTA International tournaments. The players/nations are sorted by: Titles information. The  following players won their first main circuit title in singles, doubles, or mixed doubles: The following players defended a main circuit title in singles, doubles, or mixed doubles: Best ranking. The following players achieved their career high ranking in this season inside top 50 (in bold the players who entered the top 10 for the first time): WTA Rankings. These are the WTA rankings of the top 20 singles players, doubles players, and the top 10 doubles teams on the WTA Tour, at the current date of the 2018 season. Points distribution. S = singles players, D = doubles teams , Q = qualification players. <nowiki>*</nowiki> Assumes undefeated Round Robin match record. Retirements. Following is a list of notable players (winners of a main tour title, and/or part of the WTA Rankings top 100 [singles] or top 100 [doubles] for at least one week) who announced their retirement from professional tennis, became inactive (after not playing for more than 52 weeks), or were permanently banned from playing, during the 2018 season: Comebacks. Following are notable players who will come back after retirements during the 2018 WTA Tour season: