| Singles | |
|---|---|
| 2018 Open de Cagnes-sur-Mer | |
| Champion |  Rebecca Peterson |
| Runner-up |  Dayana Yastremska |
| Final score | 6–4, 7–5 |
Beatriz Haddad Maia was the defending champion, but chose to compete at the 2018 Mutua Madrid Open instead.
Rebecca Peterson won the title, defeating Dayana Yastremska in the final, 6–4, 7–5.
Carina Witthöft (first round)
Pauline Parmentier (first round) Océane Dodin (second round) Andrea Petkovic (semifinals)
Viktória Kužmová (quarterfinals)
Arantxa Rus (first round)
Jana Fett (first round) Rebecca Peterson (champion)| Semifinals | Final | ||||||||||||
 Ons Jabeur | 2 | 3 | |||||||||||
| 8 | Rebecca Peterson | 6 | 6 | ||||||||||
| 8 | Rebecca Peterson | 6 | 7 | ||||||||||
| Q | Dayana Yastremska | 4 | 5 | ||||||||||
| 4/WC | Andrea Petkovic | 2 | 1 | ||||||||||
| Q | Dayana Yastremska | 6 | 6 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | C Witthöft | 3 | 4 | ||||||||||||||||||||||||
| Q | B Schoofs | 6 | 6 | Q | B Schoofs | 6 | 6 | ||||||||||||||||||||
 D Kovinić | 6 | 6 | D Kovinić | 4 | 4 | ||||||||||||||||||||||
 C Zhao | 3 | 2 | Q | B Schoofs | 2 | 2 | |||||||||||||||||||||
 A Blinkova | 5 | 6 | 4 | O Jabeur | 6 | 6 | |||||||||||||||||||||
| Q |  A Dulgheru | 7 | 4 | 6 | Q | A Dulgheru | 1 | 2 | |||||||||||||||||||
| O Jabeur | 6 | 6 | O Jabeur | 6 | 6 | ||||||||||||||||||||||
| 6 | A Rus | 0 | 3 | O Jabeur | 2 | 3 | |||||||||||||||||||||
| 3 | O Dodin | 6 | 6 | 8 | R Peterson | 6 | 6 | ||||||||||||||||||||
 M Zanevska | 3 | 3 | 3 | O Dodin | 1 | 7 | 1 | ||||||||||||||||||||
| Q |  D Seguel | 6 | 6 | Q | D Seguel | 6 | 5 | 6 | |||||||||||||||||||
 D Jakupović | 4 | 3 | Q | D Seguel | 3 | 4 | |||||||||||||||||||||
| WC | F Ferro | 6 | 3 | 4 | 8 | R Peterson | 6 | 6 | |||||||||||||||||||
| T Korpatsch | 4 | 6 | 6 | T Korpatsch | 2 | 1 | |||||||||||||||||||||
| WC | A Hesse | 0 | 0 | 8 | R Peterson | 6 | 6 | ||||||||||||||||||||
| 8 | R Peterson | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5 | V Kužmová | 6 | 6 | ||||||||||||||||||||||||
| LL |  P Hon | 3 | 2 | 5 | V Kužmová | 7 | 6 | ||||||||||||||||||||
 T Martincová | 4 | 2 |  J Paolini | 5 | 2 | ||||||||||||||||||||||
| J Paolini | 6 | 6 | 5 | V Kužmová | 6 | 2 | 1 | ||||||||||||||||||||
 M Fręch | 2 | 3 | 4/WC | A Petkovic | 2 | 6 | 6 | ||||||||||||||||||||
| E Rodina | 6 | 6 | E Rodina | 0 | 3 | ||||||||||||||||||||||
| WC | E Bouchard | 4/WC | A Petkovic | 6 | 6 | ||||||||||||||||||||||
| 4/WC | A Petkovic | w/o | 4/WC | A Petkovic | 2 | 1 | |||||||||||||||||||||
| 7 | J Fett | 2 | 63 | Q | D Yastremska | 6 | 6 | ||||||||||||||||||||
 N Gibbs | 6 | 77 | N Gibbs | 4 | 65 | ||||||||||||||||||||||
 V Golubic | 6 | 4 | 6 | V Golubic | 6 | 77 | |||||||||||||||||||||
| LL | J Fourlis | 3 | 6 | 1 | V Golubic | 5 | 6 | 4 | |||||||||||||||||||
| O Rogowska | 5 | 2 | Q | D Yastremska | 7 | 1 | 6 | ||||||||||||||||||||
| Q | D Yastremska | 7 | 6 | Q | D Yastremska | 6 | 6 | ||||||||||||||||||||
| J Teichmann | 6 | 64 | 6 | J Teichmann | 3 | 3 | |||||||||||||||||||||
| 2 | P Parmentier | 2 | 77 | 4 | |||||||||||||||||||||||
Kurumi Nara was the defending champion, but chose to compete in Dubai instead.
Irina-Camelia Begu and María Irigoyen were the defending champions, but retired in the final against Ysaline Bonaventure and Rebecca Peterson.
Eugenie Bouchard was the defending champion, but chose not to participate this year.
Monica Niculescu was the defending champion, but she lost in the quarterfinals to Yanina Wickmayer.
Kateryna Bondarenko was the defending champion, but chose not to participate.
Ysaline Bonaventure and Rebecca Peterson were the defending champions, but Bonaventure chose not to participate this year. Peterson played alongside Julia Glushko, but lost in the first round to Paula Cristina Gonçalves and Sanaz Marand.
Verónica Cepede Royg and María Irigoyen won the title, defeating Tara Moore and Conny Perrin in the final, 6–1, 7–6(7–5).
Timea Bacsinszky was the defending champion, but chose to compete in Doha instead.
Louisa Chirico was the defending champion, but chose to participate in Stuttgart instead.
Yanina Wickmayer was the defending champion, but lost in the first round to Viktorija Golubic.
Rebecca Peterson was the defending champion, but lost to Danielle Collins in the semifinal.
Julia Glushko and Rebecca Peterson were the defending champions, but Glushko chose not to participate. Peterson partnered Sanaz Marand, but they lost in the first round.
Lesia Tsurenko was the defending champion and successfully defended her title, defeating Stefanie Vögele in the final, 5–7, 7–6(7–2), 6–2.
Anastasija Sevastova was the defending champion, but lost in the final to Tatjana Maria, 4–6, 5–7. This was Maria's first WTA title.
Caroline Garcia was the defending champion but lost in the second round to Kateřina Siniaková.
The singles tournament at the 2019 WTA 250 Ladies Open Lugano in tennis was played on clay and contested between 50 women on 8 — 14 April 2019. Elise Mertens was defending champion, but abstained.
Elina Svitolina was the two-time defending champion, but lost in the second round to Victoria Azarenka.
Wang Qiang was the defending champion, but chose not to participate this year.
Aryna Sabalenka was the defending champion, and successfully defended her title, defeating Alison Riske in the final 6–3, 3–6, 6–1.
Caroline Wozniacki was the defending champion, but lost to Naomi Osaka in the semifinals.
Anett Kontaveit defeated Maria Sakkari in the final, 5–7, 7–6(7–4), 7–5 to win the singles title at the 2022 St. Petersburg Ladies' Trophy. Kontaveit's victory in the final was her 20th consecutive match win on indoor hard courts, dating back to the 2021 Ostrava Open; this is the longest such streak since Justine Henin won 22 matches on indoor courts between October 2007 and May 2010.