2019 Rogers Cup – Women's singles

Bianca Andreescu won the women's singles tennis title at the 2019 Canadian Open after Serena Williams retired in the final due to back spasms, with the scoreline at 3–1. Andreescu became the first Canadian to win the event since Faye Urban in 1969.

Simona Halep was the defending champion, but retired in the quarterfinals against Marie Bouzková.

Naomi Osaka regained the WTA No. 1 singles ranking after Ashleigh Barty lost in the second round and Karolína Plíšková lost in the quarterfinals to Andreescu.

Seeds
The top eight seeds received a bye into the second round. • 🇦🇺 Ashleigh Barty (second round)

• 🇯🇵 Naomi Osaka (quarterfinals)

• 🇨🇿 Karolína Plíšková (quarterfinals)

• 🇷🇴 Simona Halep (quarterfinals, retired due to an Achilles injury)

• Kiki Bertens (third round)

• 🇺🇦 Elina Svitolina (quarterfinals)

• 🇺🇸 Sloane Stephens (second round)

• 🇺🇸 Serena Williams (final, retired due to back spasms)

• 🇧🇾 Aryna Sabalenka (first round)

• Anastasija Sevastova (first round)

• Belinda Bencic (third round)

• 🇩🇪 Angelique Kerber (first round)

• 🇬🇧 Johanna Konta (first round)

• 🇺🇸 Madison Keys (first round)

• Caroline Wozniacki (second round)

• 🇪🇪 Anett Kontaveit (third round)

Seeds
• # 🇨🇳 Zhang Shuai (qualifying competition, retired, Lucky loser)

• # 🇺🇸 Alison Riske (qualified)

• # 🇦🇺 Ajla Tomljanović (qualified)

• # Monica Puig (qualifying competition)

• # 🇷🇺 Ekaterina Alexandrova (qualified)

• # Polona Hercog (qualified)

• # 🇷🇴 Mihaela Buzărnescu (qualifying competition)

• # 🇹🇳 Ons Jabeur (qualifying competition)

• # 🇵🇱 Iga Świątek (qualified)

• # 🇺🇦 Kateryna Kozlova (first round)

• # 🇸🇪 Rebecca Peterson (qualifying competition)

• # 🇵🇱 Magda Linette (first round)

• # 🇩🇪 Tatjana Maria (qualified)

• # 🇷🇺 Anastasia Potapova (qualified)

• # 🇺🇸 Jennifer Brady (qualified)

• # 🇩🇪 Andrea Petkovic (qualifying competition)

• # 🇯🇵 Misaki Doi (qualified)

• # 🇨🇿 Marie Bouzková (qualified)

• # 🇦🇺 Astra Sharma (first round)

• # 🇺🇸 Christina McHale (qualifying competition)

• # 🇬🇧 Heather Watson (qualifying competition)

• # 🇧🇪 Ysaline Bonaventure (first round)

• # 🇺🇸 Varvara Lepchenko (qualifying competition)

• # 🇨🇿 Barbora Krejčíková (first round)

Qualifiers
• # 🇷🇺 Anastasia Potapova

• # 🇺🇸 Alison Riske

• # 🇦🇺 Ajla Tomljanović

• # 🇺🇸 Jennifer Brady

• # 🇷🇺 Ekaterina Alexandrova

• # Polona Hercog

• # 🇯🇵 Misaki Doi

• # 🇺🇸 Francesca Di Lorenzo

• # 🇵🇱 Iga Świątek

• # 🇨🇿 Marie Bouzková

• # 🇨🇳 Wang Xiyu

• # 🇩🇪 Tatjana Maria

Lucky loser

 * 1) 🇨🇳 Zhang Shuai