Réka-Luca Jani and Christina Shakovets were the defending champions, having won the event in 2012, but Jani decided not to participate. Shakovets partnered up with Alona Fomina as the fourth seeds, but they lost in the first round.
The singles Tournament at the 2007 İstanbul Cup took place between 21 and 26 May on outdoor clay courts in İstanbul, Turkey. Elena Dementieva won the title, defeating Aravane Rezaï in the final.
María Irigoyen and Barbora Krejčíková were the defending champions, but chose not to participate.
The 2017 Advantage Cars Prague Open by Zenova was a professional tennis tournament played on outdoor clay courts. It was the 24th (men) and third (women) editions of the tournament and was part of the 2017 ATP Challenger Tour and the 13th edition of the women's tournament, this year as part of 2017 ITF Women's Circuit. It took place in Prague, Czech Republic, on 24–30 July 2017.
The women's singles of the 2017 Advantage Cars Prague Open tournament was played on clay in Prague, Czech Republic.
Dominika Cibulková was the defending champion but withdrew before the tournament began.
Océane Dodin was the defending champion, but chose not to participate.
Aryna Sabalenka was the defending champion, but chose to participate in Taipei instead.
Mandy Minella and Nina Stojanović were the defending champions, however both players chose not to participate.
Mona Barthel was the defending champion, but lost in the first round to Antonia Lottner.
Anna-Lena Grönefeld and Květa Peschke were the defending champions, but chose not to participate together. Grönefeld was scheduled to play alongside Raquel Atawo, but the pair withdrew due to Atawo's abductor injury. Peschke teamed up with Nicole Melichar and successfully defended the title, defeating Mihaela Buzărnescu and Lidziya Marozava in the final, 6–4, 6–2.
Monique Adamczak and Storm Sanders were the defending champions, but both players chose not to participate.
Latisha Chan and Martina Hingis were the defending champions, but Hingis retired from professional tennis at the end of 2017. Chan played alongside Peng Shuai, but they lost in the first round to Irina-Camelia Begu and Mihaela Buzărnescu.
Irina-Camelia Begu and Raluca Olaru were the defending champions, but chose not to participate together. Olaru played alongside Mihaela Buzărnescu, but lost in the semifinals to Danka Kovinić and Maryna Zanevska. Begu teamed up with Andreea Mitu and successfully defended the title, defeating Kovinić and Zanevska in the final, 6–3, 6–4.
Madison Keys was the defending champion, but withdrew due to a wrist injury.
Mihaela Buzărnescu and Alena Fomina were the defending champions, but Buzărnescu chose not participate.
Petra Kvitová was the defending champion, but chose not to participate this year.
Mihaela Buzărnescu and Raluca Olaru were the defending champions, but Buzărnescu chose not to participate this year. Olaru played alongside Darija Jurak, but lost in the semifinals to Daria Gavrilova and Ellen Perez.
The Phillip Island Trophy was a new addition to the WTA Tour in 2021.
Andrea Sestini Hlaváčková and Lucie Hradecká were the defending champions having won the previous edition in 2013, but Hradecká chose to compete at the 2021 Prague Open instead, whilst Sestini Hlaváčková retired from professional tennis in 2019.
Anastasia Potapova 
Dayana Yastremska 
Mihaela Buzărnescu 
