2018 WTA season
ATPWTA
The 2018 WTA season: 2,456 matches. Grand Slam champions: Wozniacki C., Halep S., Kerber A., Osaka N.; most titles: Kvitova P. (5).
Hard 1,494 · Clay 665 · Grass 297 matches
Grand Slams, Tour Finals and 1000s
| 27 Jan 2018 | Australian Open Grand Slam | Wozniacki C. |
| 9 Jun 2018 | French Open Grand Slam | Halep S. |
| 14 Jul 2018 | Wimbledon Grand Slam | Kerber A. |
| 8 Sept 2018 | US Open Grand Slam | Osaka N. |
| 28 Oct 2018 | BNP Paribas WTA Finals Tour Finals | Svitolina E. |
Most titles
Longest winning runs
Biggest upsets by the odds
| 3 Jul 2018 | Sasnovich A. (50) | Kvitova P. (7) | 10.60 | Wimbledon Grand Slam1st Round |
| 27 May 2018 | Kozlova K. (67) | Ostapenko J. (5) | 7.68 | French Open Grand Slam1st Round |
| 11 Apr 2018 | Arango E. (510) | Cepede Royg V. (84) | 7.40 | Copa Claro Colsanitas 2501st Round |
| 27 Aug 2018 | Kanepi K. (44) | Halep S. (1) | 7.27 | US Open Grand Slam1st Round |
| 27 Apr 2018 | Parmentier P. (122) | Wozniacki C. (2) | 7.13 | Istanbul Cup 250Quarterfinals |
| 28 Feb 2018 | Zarazua R. (253) | Pliskova Kr. (77) | 6.44 | Abierto Mexicano 2501st Round |
| 6 Jul 2018 | Rodina E. (120) | Keys M. (11) | 6.37 | Wimbledon Grand Slam3rd Round |
| 18 Jan 2018 | Pera B. (123) | Konta J. (10) | 6.19 | Australian Open Grand Slam2nd Round |
| 7 Jan 2018 | Perez E. (341) | Mladenovic K. (11) | 6.05 | Sydney International Premier1st Round |
| 6 May 2018 | Sorribes Tormo S. (129) | Keys M. (14) | 6.04 | Mutua Madrid Open Premier1st Round |
Biggest upsets by ranking
| 27 Aug 2018 | King V. (881) | Vikhlyantseva N. (112) | 769 | US Open Grand Slam1st Round |
| 15 Jan 2018 | Kostyuk M. (521) | Peng S. (27) | 494 | Australian Open Grand Slam1st Round |
| 20 May 2018 | Jani R.L. (535) | Vickery S. (76) | 459 | Internationaux de Strasbourg 2501st Round |
| 31 Jan 2018 | Rybakina E. (450) | Garcia C. (7) | 443 | Ladies Trophy 2502nd Round |
| 2 Jun 2018 | Williams S. (451) | Goerges J. (11) | 440 | French Open Grand Slam3rd Round |
| 31 May 2018 | Williams S. (451) | Barty A. (17) | 434 | French Open Grand Slam2nd Round |
| 8 Jan 2018 | Friedsam A.L. (507) | Van Uytvanck A. (78) | 429 | Hobart International 2501st Round |
| 11 Apr 2018 | Arango E. (510) | Cepede Royg V. (84) | 426 | Copa Claro Colsanitas 2501st Round |
| 30 Jan 2018 | Rybakina E. (450) | Bacsinszky T. (42) | 408 | Ladies Trophy 2501st Round |
| 11 Sept 2018 | Govortsova O. (550) | Ahn K. (144) | 406 | Coupe Banque Nationale 2501st Round |
Every final (58)
| 4 Jan 2018 | Ladies Trophy 250 | Kvitova P. |
| 4 Jan 2018 | Taiwan Open 250 | Babos T. |
| 6 Jan 2018 | Brisbane International Premier | Svitolina E. |
| 6 Jan 2018 | Shenzhen Open 250 | Halep S. |
| 7 Jan 2018 | ASB Classic 250 | Goerges J. |
| 13 Jan 2018 | Hobart International 250 | Mertens E. |
| 13 Jan 2018 | Sydney International Premier | Kerber A. |
| 27 Jan 2018 | Australian Open Grand Slam | Wozniacki C. |
| 18 Feb 2018 | Qatar Total Open Premier | Kvitova P. |
| 24 Feb 2018 | Dubai Duty Free Tennis Championships Premier | Svitolina E. |
| 25 Feb 2018 | Hungarian Ladies Open 250 | Van Uytvanck A. |
| 4 Mar 2018 | Abierto Mexicano 250 | Tsurenko L. |
| 18 Mar 2018 | BNP Paribas Open Premier | Osaka N. |
| 31 Mar 2018 | Sony Ericsson Open Premier | Stephens S. |
| 8 Apr 2018 | Family Circle Cup Premier | Bertens K. |
| 8 Apr 2018 | Monterrey Open 250 | Muguruza G. |
| 15 Apr 2018 | Copa Claro Colsanitas 250 | Schmiedlova A. |
| 15 Apr 2018 | Samsung Open 250 | Mertens E. |
| 29 Apr 2018 | Istanbul Cup 250 | Parmentier P. |
| 29 Apr 2018 | Porsche Tennis Grand Prix Premier | Pliskova Ka. |
| 5 May 2018 | Grand Prix SAR Lalla Meryem 250 | Mertens E. |
| 5 May 2018 | J&T Banka Prague Open 250 | Kvitova P. |
| 12 May 2018 | Mutua Madrid Open Premier | Kvitova P. |
| 20 May 2018 | Internazionali BNL d'Italia Premier | Svitolina E. |
| 26 May 2018 | Internationaux de Strasbourg 250 | Pavlyuchenkova A. |
| 26 May 2018 | Nürnberger Versicherungscup 250 | Larsson J. |
| 9 Jun 2018 | French Open Grand Slam | Halep S. |
| 17 Jun 2018 | Aegon Open 250 | Barty A. |
| 17 Jun 2018 | Ricoh Open 250 | Krunic A. |
| 24 Jun 2018 | AEGON Classic Premier | Kvitova P. |
| 24 Jun 2018 | Mallorca Open 250 | Maria T. |
| 30 Jun 2018 | Eastbourne International Premier | Wozniacki C. |
| 14 Jul 2018 | Wimbledon Grand Slam | Kerber A. |
| 22 Jul 2018 | Bucharest Open 250 | Sevastova A. |
| 22 Jul 2018 | Ladies Championship Gstaad 250 | Cornet A. |
| 29 Jul 2018 | Jiangxi Women's Tennis Open 250 | Wang Q. |
| 29 Jul 2018 | Moscow River Cup 250 | Danilovic O. |
| 5 Aug 2018 | Citi Open 250 | Kuznetsova S. |
| 5 Aug 2018 | Mubadala Silicon Valley Classic Premier | Buzarnescu M. |
| 12 Aug 2018 | Rogers Cup Premier | Halep S. |
| 19 Aug 2018 | Western & Southern Financial Group Women's Open Premier | Bertens K. |
| 25 Aug 2018 | Connecticut Open Premier | Sabalenka A. |
| 8 Sept 2018 | US Open Grand Slam | Osaka N. |
| 16 Sept 2018 | Coupe Banque Nationale 250 | Parmentier P. |
| 16 Sept 2018 | Japan Women's Tennis Open 250 | Hsieh S.W. |
| 22 Sept 2018 | Guangzhou Open 250 | Wang Q. |
| 23 Sept 2018 | Korea Open 250 | Bertens K. |
| 23 Sept 2018 | Toray Pan Pacific Open Premier | Pliskova Ka. |
| 29 Sept 2018 | Tashkent Open 250 | Gasparyan M. |
| 29 Sept 2018 | Wuhan Open Premier | Sabalenka A. |
| 7 Oct 2018 | China Open Premier | Wozniacki C. |
| 14 Oct 2018 | Generali Ladies Linz 250 | Giorgi C. |
| 14 Oct 2018 | Prudential Hong Kong Tennis Open 250 | Yastremska D. |
| 14 Oct 2018 | Tianjin Open 250 | Garcia C. |
| 20 Oct 2018 | BGL BNP Paribas Luxembourg Open 250 | Goerges J. |
| 20 Oct 2018 | Kremlin Cup Premier | Kasatkina D. |
| 28 Oct 2018 | BNP Paribas WTA Finals Tour Finals | Svitolina E. |
| 4 Nov 2018 | WTA Elite Trophy 500 | Barty A. |
Rankings (in brackets) are as at the match. Odds are the winner's pre-match average market price (Bet365 or Pinnacle before 2010). Winning runs ignore walkovers. Tour-level main draws. Data: tennis-data.co.uk.