Anastasia Pavlyuchenkova was the defending champion, but chose not to participate.
Elise Mertens defeated Simona Halep in the final, 3–6, 6–4, 6–3 to win the singles tennis title at the 2019 WTA Qatar Open.
Anastasija Sevastova was the defending champion, but lost in the second round to Patricia Maria Țig.
Simona Waltert is a Swiss tennis player.
Defending champion Aryna Sabalenka defeated Alison Riske in the final, 6–3, 3–6, 6–1 to win the singles tennis title at the 2019 Wuhan Open.
Susan Bandecchi is a Swiss tennis player. She reached a career-high singles ranking of world No. 164 on 7 March 2022, and her best doubles ranking of No. 141 on 11 July 2022.
The 2021 Ladies Open Lausanne was a women's tennis tournament played on outdoor clay courts. It was the 28th edition of the Ladies Open Lausanne, and part of the 250 category of the 2021 WTA Tour. It took place at Tennis Club Stade-Lausanne in Lausanne, Switzerland, from 12 through 18 July 2021.
Fiona Ferro was the defending champion from 2019, when the event was last held, but lost to Clara Burel in the quarterfinals.
Maryna Zanevska won her maiden WTA Tour singles title, defeating Kristína Kučová in the final, 6–4, 7–6(7–4).
Arantxa Rus and Tamara Zidanšek were the reigning champions, but chose not to participate.
Anna Chakvetadze was the champion when the event was last held in 2010, but she retired from professional tennis in 2013.
Paula Kania-Choduń and Julia Lohoff were the defending champions but chose not to participate.
The 2022 Ladies Open Lausanne was a women's tennis tournament played on outdoor clay courts. It was the 29th edition of the Ladies Open Lausanne, and part of the 250 category of the 2022 WTA Tour. It took place at Tennis Club Stade-Lausanne in Lausanne, Switzerland, from 11 through 17 July 2022.
Petra Martić defeated Olga Danilović in the final, 6–4, 6–2 to win the singles tennis title at the 2022 Ladies Open Lausanne. It was Martić's first WTA title since Istanbul in 2019.
Olga Danilović and Kristina Mladenovic won the doubles tennis title at the 2022 Ladies Open Lausanne after Ulrikke Eikeri and Tamara Zidanšek withdrew from the final.
Mayar Sherif defeated Maria Sakkari in the final, 7–5, 6–3 to win the women's singles tennis title at the 2022 Emilia-Romagna Open. It was her maiden WTA Tour title, and Sherif became the first Egyptian to win a WTA Tour singles title.
The defending champion Ana Bogdan won her second consecutive women's singles title at the 2023 Iași Open, defeating Irina-Camelia Begu in the final, 6–2, 6–3.
Karolína Plíšková defeated Ana Bogdan in the final, 6–4, 6–3 to win the singles tennis title at the 2024 Transylvania Open. It was Plíšková's first title since the 2020 Brisbane International, and she didn't lose a set en route.
Aliona Bolsova and Andrea Gámiz were the reigning champions, but Bolsova did not participate this year. Gámiz partnered Yuliana Lizarazo but lost in the quarterfinals to Anna Bondár and Tamara Zidanšek.
Last year's finalist Anna Karolína Schmiedlová won the title, defeating Mayar Sherif in the final, 7–5, 2–6, 6–4.
Susan Bandecchi 
Ulrikke Eikeri 
Valentini Grammatikopoulou 
