Ekaterina Evgenyevna Alexandrova (Russian: Екатери́на Евге́ньевна Александро́ва, IPA: [jɪkətʲɪˈrʲinə ɐlʲɪksɐnˈdrovə]; born 15 November 1994) is a Russian professional tennis player. She has a career-high WTA singles ranking of world No. 10, achieved on 13 October 2025 and a best doubles ranking of No. 41, reached on 8 September 2025.

Alexandrova has won seven WTA Tour titles combined, five in singles and two in doubles. She also earned three WTA Challenger titles in singles, as well as seven singles titles on the ITF Women's Tour.

Since 2006, Alexandrova has been living and training in Prague, Czech Republic, with her parents and two siblings, a brother and a sister. They moved after travelling to the city for a youth tournament, attracted by the local availability of tennis courts compared to Russia. According to the player, the Russian Tennis Federation didn't know about her existence before 2016 and she has never been good enough to cause interest from the Czech Tennis Association in terms of citizenship switch. However, she has long been tempted by the easier life possibility with a Czech passport, especially considering travel visas, but wasn't able to implement the opportunity at a certain point — after collecting all the necessary documents she couldn't decide if another citizenship is really the right decision for her. She hasn't applied for the Czech citizenship yet.

Alexandrova speaks Russian and Czech fluently, and also English, to a lesser extent. Her father Evgeny is her coach, and Steffi Graf was her childhood tennis idol.

Alexandrova started the year ranked No. 291 and clinched her fifth ITF Circuit title in February at the 10k event in Trnava, defeating Karolína Muchová in the final.

In April, Alexandrova made her WTA Tour singles debut at the Katowice Open where she qualified for the main draw, after surviving the qualifying rounds as an unseeded player. In her first WTA main-draw match, she defeated world No. 115 Klára Koukalová, before falling to eventual finalist Camila Giorgi in three sets.

In June, Alexandrova competed at the Wimbledon Championships, which was both the first grass-court tournament of her career and her major debut. At the time of the entry deadline for the qualifying draw, she was 10 ranking spots below the cutoff and ultimately gained entry after a last-minute withdrawal. She qualified for the main draw after defeating Ons Jabeur in the first round and then prevailing 14–12 and 13–11 in three-set matches against Stephanie Vogt (saved a match point) and Harriet Dart, respectively. Overall, she played 108 games in just three matches. In the first round, she defeated 23rd seed and former world No. 1, Ana Ivanovic, in straight sets, causing one of the biggest upsets in the tournament. In the second round, she lost to Anna-Lena Friedsam.

After her Wimbledon run, Alexandrova returned to clay and reached the final of the ITS Cup, a 50k event, losing to compatriot and top seed Elizaveta Kulichkova in three sets.