2018 WTA Tour (English Wikipedia)

"2018 WTA calendar" (PDF). wtatennis.com. WTA Tour, Inc. Archived (PDF) from the original on 9 June 2022. Retrieved 16 October 2022.
"Singles Rankings Numeric List 4 November 2013" (PDF). wtatour.com. WTA Tour, Inc. Archived from the original (PDF) on 11 March 2016.
"Former No. 32 Jovanovski Retires at Age 26". Tennis.com. 30 November 2018. Archived from the original on 28 August 2019. Retrieved 28 August 2019.

wtatennis.com

"Singles Rankings". Women's Tennis Association.
"Doubles Rankings". Women's Tennis Association.
"WTA Championships Road to Singapore Singles Rankings". Women's Tennis Association.
"Singles Rankings Numeric List 4 November 2013" (PDF). wtatour.com. WTA Tour, Inc. Archived from the original (PDF) on 11 March 2016.
"WTA Championships Road to Singapore Doubles Rankings". Women's Tennis Association.
"WTA rankings – 2018-11-05". wtatennis.com. WTA Tour, Inc. Retrieved October 20, 2019.
"January 2018 WTA Player of the Month: Simona Halep".
"February 2018 WTA Player of the Month: Petra Kvitova".
"March 2018 Player of the Month: Naomi Osaka".
"April 2018 Player of the Month: Karolina Pliskova".
"May 2018 Player of the Month: Simona Halep".
"June 2018 Player of the Month: Petra Kvitova".
"July 2018 Player of the Month: Angelique Kerber".
"August 2018 Player of the Month: Naomi Osaka".
"September 2018 Player of the Month: Aryna Sabalenka".
"October 2018 Player of the Month: Elina Svitolina".
"January 2018 Breakthrough of the Month: Hsieh Su-wei".
"February 2018 WTA Breakthrough of the Month: Daria Kasatkina".
"March 2018 Breakthrough of the Month: Danielle Collins".
"April 2018 Breakthrough of the Month: Ana Bogdan".
"Breakthrough Player of the Month, May 2018: Mihaela Buzarnescu".
"June 2018 Breakthrough of the Month: Tatjana Maria".
"July 2018 Breakthrough of the Month: Wang Qiang".
"August 2018 Breakthrough of the Month: Aryna Sabalenka".
"September 2018 Breakthrough of the Month: Anett Kontaveit".
"October 2018 Breakthrough of the Month: Ashleigh Barty".
"January 2018 Shot of the Month: Agnieszka Radwanska". wtatennis.com. WTA Tour, Inc. Retrieved 2 February 2018.
"February 2018 WTA Shot of the Month: Maria Sharapova". wtatennis.com. WTA Tour, Inc. Retrieved 9 March 2018.
"March 2018 Shot of the Month: Simona Halep". wtatennis.com. WTA Tour, Inc. Retrieved 6 April 2018.
"April 2018 Shot of the Month: Maria Sharapova". wtatennis.com. WTA Tour, Inc. Retrieved 4 May 2018.
"May 2018 Shot of the Month: Simona Halep". wtatennis.com. WTA Tour, Inc. Retrieved 15 June 2018.
"June 2018 Shot of the Month: Caroline Wozniacki".
"July 2018 Shot of the Month: Magda Linette".
"August 2018 Shot of the Month: Maria Sharapova".
"September 2018 Shot of the Month: Hsieh Su-wei".
"October 2018 Shot of the Month: Ons Jabeur".
"Former Top 40 star Marina Erakovic announces retirement". WTA Tennis. 10 December 2018. Retrieved 28 August 2019.
"Medina Garrigues to retire at US Open". WTA. 27 July 2018. Retrieved 28 July 2018.
"Agnieszka Radwanska announces retirement from professional tennis". WTA. 14 November 2018. Retrieved 14 November 2018.
"Ukrainian double threat Olga Savchuk ends career at US Open".
"Francesca Schiavone of Italy retires after outstanding career". WTA Tennis. 5 September 2018. Retrieved 28 August 2019.
"'Let's try something new' – Schnyder retires for second time". WTA Tennis. 23 November 2018. Retrieved 28 August 2019.

wtafiles.wtatennis.com

"2018 WTA calendar" (PDF). wtatennis.com. WTA Tour, Inc. Archived (PDF) from the original on 9 June 2022. Retrieved 16 October 2022.
"WTA Prize Money" (PDF). wtatennis.com. WTA Tour, Inc.
"WTA MATCHFACTS" (PDF). wtatour.com. Retrieved 4 December 2018.