The 2021 WTA Tour was the elite professional tennis circuit organised by the Women's Tennis Association (WTA) for the 2021 tennis season. The 2021 WTA Tour calendar comprises the Grand Slam tournaments (supervised by the International Tennis Federation (ITF)), the WTA 1000 tournaments, the WTA 500 tournaments, the WTA 250 tournaments, the Billie Jean King Cup (organized by the ITF), and the year-end championships (the WTA Finals and the WTA Elite Trophy). Also included in the 2021 calendar are the Summer Olympic Games, which were rescheduled from 2020. Schedule This is the complete schedule of events on the 2021 calendar. Key January February March April May June July August September October November Affected tournaments The COVID-19 pandemic affected tournaments on both the ATP and WTA tours. The following tournaments were cancelled or postponed due to the COVID-19 pandemic. 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 2019 WTA Tour: the Grand Slam tournaments, the year-end championships (the WTA Tour Championships and the WTA Elite Trophy), the WTA Premier tournaments (WTA 1000 and WTA 500), and the WTA 250. The players/nations are sorted by: total number of titles (a doubles title won by two players representing the same nation counts as only one win for the nation); cumulated importance of those titles (one Grand Slam win equalling two WTA 1000 wins, one year-end championships win equalling one-and-a-half WTA 1000 win, one WTA 1000 win equalling two WTA 500 wins, one WTA 500 win equalling two WTA 250 wins); a singles > doubles > mixed doubles hierarchy; alphabetical order (by family names for players). Key Titles won by player Titles won by nation Titles information The following players won their first main circuit title in singles, doubles, or mixed doubles: Singles Clara Tauson () – Lyon (draw) Sara Sorribes Tormo () – Guadalajara (draw) Leylah Fernandez () – Monterrey (draw) María Camila Osorio Serrano () – Bogotá (draw) Veronika Kudermetova () – Charleston 1 (draw) Astra Sharma (25 years, 219 days) – Charleston 2 (draw) Paula Badosa () – Belgrade (draw) Barbora Krejčíková () – Strasbourg (draw) Ons Jabeur () – Birmingham (draw) Liudmila Samsonova () – Berlin (draw) Elena-Gabriela Ruse () – Hamburg (draw) Tamara Zidanšek () – Lausanne (draw) Maryna Zanevska () – Gdynia