Answer
Ekaterina Alexandrova has won four WTA singles titles. She won her first title at the 2018 Bucharest Open, defeating Alizé Cornet in the final. She won her second title at the 2019 Moscow Open, defeating Svetlana Kuznetsova in the final. She won her third title at the 2020 St. Petersburg Ladies Trophy, defeating Anastasia Pavlyuchenkova in the final.