Tamara Zidanšek (Slovene: [zíːdanˈʃɛːk]; born 26 December 1997) is a Slovenian tennis player.
She has career-high WTA rankings of No. 22 in singles and No. 56 in doubles, and as of June 2021[update] is the current No. 1 Slovene tennis player in singles. She has won one singles title and four doubles titles on the WTA Tour and two WTA 125 singles titles, as well as 17 singles and four doubles titles on the ITF Circuit. On the junior tour, she was a top 20 junior and had a career-high ranking of No. 16, achieved in December 2015. Playing for Slovenia Fed Cup team, she has a win–loss record of 6–7.
Zidanšek made a perfect professional debut in 2014 at her home in Velenje, passing three qualifying rounds to go in the main draw and claim the first title on the pro-level still at the age of 16.
2021: First Grand Slam singles semifinal, top 50 debut, first top-10 win, top 30 year-end ranking
She reached the quarterfinals and the semifinals of a Grand Slam event at the 2021 French Open for the first time in her career, after defeating Sorana Cîrstea in straight sets and Paula Badosa in three sets, making her the first Slovenian female player to accomplish this since the country achieved its independence in 1991. As a result, Zidanšek entered the top 50 for the first time in her career. She also scored her first top-ten win in the first round over No. 6 seed, Bianca Andreescu. In the semifinal, Zidanšek was defeated in straight sets by Anastasia Pavlyuchenkova.
^The first Premier 5 event of the year has switched back and forth between the Dubai Tennis Championships and the Qatar Total Open since 2009. Dubai was classified as a Premier 5 event from 2009–2011 before being succeeded by Doha for the 2012–2014 period. In 2015, Dubai regained its Premier 5 status while Doha was demoted to Premier status. The Premier 5 tournaments were reclassified as WTA 1000 tournaments in 2021.