| Women's singles | |
|---|---|
| 2018 President's Cup (tennis) | |
| Champion |  Ekaterine Gorgodze |
| Runner-up |  Sabina Sharipova |
| Final score | 6–4, 6–1 |
Zhang Shuai was the defending champion, but chose not to participate.
Ekaterine Gorgodze won the title after defeating Sabina Sharipova 6–4, 6–1 in the final.
Sabina Sharipova (final)
Marie Bouzková (semifinals)
Nina Stojanović (second round)
Olga Doroshina (quarterfinals) Ekaterine Gorgodze (champion) Nigina Abduraimova (second round) Valeria Savinykh (second round)
Mai Minokoshi (second round)| Semifinals | Final | ||||||||||||
| 1 | Sabina Sharipova | 6 | 6 | ||||||||||
| Varvara Flink | 3 | 4 | |||||||||||
| 1 | Sabina Sharipova | 4 | 1 | ||||||||||
| 5 | Ekaterine Gorgodze | 6 | 6 | ||||||||||
| 5 | Ekaterine Gorgodze | 6 | 4 | 6 | |||||||||
| 2 | Marie Bouzková | 2 | 6 | 4 | |||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | S Sharipova | 5 | 6 | 6 | |||||||||||||||||||||||
 V Heisen | 7 | 1 | 3 | 1 | S Sharipova | 6 | 6 | ||||||||||||||||||||
| Q | K Laskutova | 2 | 4 |  B Cengiz | 1 | 3 | |||||||||||||||||||||
| B Cengiz | 6 | 6 | 1 | S Sharipova | 6 | 7 | |||||||||||||||||||||
| N Kostić | 6 | 7 | N Kostić | 3 | 5 | ||||||||||||||||||||||
| S Lansere | 4 | 5 | N Kostić | 6 | 6 | ||||||||||||||||||||||
| Q | A Frolova | 3 | 4 | 7 | V Savinykh | 4 | 3 | ||||||||||||||||||||
| 7 | V Savinykh | 6 | 6 | 1 | S Sharipova | 6 | 6 | ||||||||||||||||||||
| 4 | O Doroshina | 6 | 7 | V Flink | 3 | 4 | |||||||||||||||||||||
 I Shymanovich | 3 | 5 | 4 | O Doroshina | 6 | 6 | |||||||||||||||||||||
| A Morgina | 7 | 3 | 2 | N Kukharchuk | 2 | 0 | |||||||||||||||||||||
| N Kukharchuk | 5 | 6 | 6 | 4 | O Doroshina | 4 | 3 | ||||||||||||||||||||
| V Flink | 6 | 6 | V Flink | 6 | 6 | ||||||||||||||||||||||
| M Bolkvadze | 3 | 3 | V Flink | 6 | 6 | ||||||||||||||||||||||
| Q | B Jovanovski Petrović | 3 | 2 | 6 | N Abduraimova | 4 | 3 | ||||||||||||||||||||
| 6 | N Abduraimova | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5 | E Gorgodze | 6 | 6 | ||||||||||||||||||||||||
| WC |  A Astakhova | 2 | 4 | 5 | E Gorgodze | 7 | 77 | ||||||||||||||||||||
| A Amanmuradova | 6 | 6 | A Amanmuradova | 5 | 64 | ||||||||||||||||||||||
| G Ainitdinova | 2 | 1 | 5 | E Gorgodze | 6 | 6 | |||||||||||||||||||||
| E Kazionova | 3 | 4 | A Gasanova | 4 | 4 | ||||||||||||||||||||||
| A Gasanova | 6 | 6 | A Gasanova | 78 | 6 | ||||||||||||||||||||||
 N Bains | 0 | 4 | 3 | N Stojanović | 66 | 3 | |||||||||||||||||||||
| 3 | N Stojanović | 6 | 6 | 5 | E Gorgodze | 6 | 4 | 6 | |||||||||||||||||||
| 8 | M Minokoshi | 6 | 7 | 2 | M Bouzková | 2 | 6 | 4 | |||||||||||||||||||
| WC | D Detkovskaya | 1 | 5 | 8 | M Minokoshi | 3 | 4 | ||||||||||||||||||||
| Q | D Astakhova | 0 | 6 | 5 | E Yashina | 6 | 6 | ||||||||||||||||||||
| E Yashina | 6 | 2 | 7 | E Yashina | 3 | 77 | 2 | ||||||||||||||||||||
| WC |  K-y Ng | 3 | 4 | 2 | M Bouzková | 6 | 63 | 6 | |||||||||||||||||||
| WC | A Danilina | 6 | 6 | WC | A Danilina | 2 | 1 | ||||||||||||||||||||
 U Radwańska | 6 | 3 | 5 | 2 | M Bouzková | 6 | 6 | ||||||||||||||||||||
| 2 | M Bouzková | 2 | 6 | 7 | |||||||||||||||||||||||
Kristýna Plíšková won the title, defeating defending champion Nao Hibino in the final, 6–3, 2–6, 6–3.
Elina Svitolina was the defending champion but withdrew before her second round match.
Ivana Jorović was the defending champion but lost in the first round to Sabina Sharipova.
The 2018 President's Cup was a professional tennis tournament played on outdoor hard courts. It was the thirteenth (ATP) and tenth (ITF) editions of the tournament and was part of the 2018 ATP Challenger Tour and the 2018 ITF Women's Circuit. It took place in Astana, Kazakhstan, on 16–22 July 2018.
Natela Dzalamidze and Veronika Kudermetova were the defending champions, but decided not to participate.
Tamara Korpatsch was the defending champion, but lost in the semifinals to Laura Siegemund.
Anastasia Pavlyuchenkova was the defending champion, but chose to compete in Linz instead.
Maia Lumsden was the defending champion, but lost to Yanina Wickmayer in the quarterfinals.
Alison Van Uytvanck was the defending champion and successfully defended her title, defeating Markéta Vondroušová in the final, 1–6, 7–5, 6–2.
Ekaterine Gorgodze was the defending champion, but chose to participate at the 2019 Bucharest Open instead.
Kristina Mladenovic and Katarzyna Piter were the champions the last time the tournament was held in 2013, but chose not to participate this year.
Olga Ianchuk was the defending champion, but chose not to participate.
World No. 1 Ashleigh Barty defeated Aryna Sabalenka in the final, 3–6, 6–0, 6–3 to win the women's singles tennis title at the 2021 edition of the Stuttgart Open.
Tamara Zidanšek was the two-time defending champion, having won the last edition in 2019, however she was unable to defend her title as she was still competing at the 2021 French Open, reaching the semi-final of the Grand Slam.
Simona Halep was the defending champion, having won the previous edition in 2013, but chose not to participate.
Maryna Zanevska won her maiden WTA Tour singles title, defeating Kristína Kučová in the final, 6–4, 7–6(7–4).
Maja Chwalińska was the defending champion but chose not to participate.
Lara Arruabarrena and Renata Voráčová were the defending champions having won the previous edition in 2019, but chose not to participate.
This was the first edition of the tournament since 1987.
This was the first edition of the women's event.