2019 Sydney International – Women's singles

Angelique Kerber was the defending champion, but lost to Petra Kvitová in the quarterfinals.

Kvitová went on to win her second title in Sydney, defeating the previous year's finalist Ashleigh Barty in the final, 1–6, 7–5, 7–6(7–3).

Seeds
The top two seeds receive a bye into the second round. • #🇷🇴 Simona Halep (second round)

• #🇩🇪 Angelique Kerber (quarterfinals)

• #🇯🇵 Naomi Osaka (withdrew)

• #🇺🇸 Sloane Stephens (second round)

• #🇨🇿 Petra Kvitová (champion)

• #🇨🇿 Karolína Plíšková (withdrew)

• # Kiki Bertens (semifinals)

• #🇷🇺 Daria Kasatkina (first round)

• # Anastasija Sevastova (first round)

• #🇧🇪 Elise Mertens (quarterfinals)

Seeds
• # 🇧🇾 Aliaksandra Sasnovich (qualified)

• # 🇨🇿 Kateřina Siniaková (qualified)

• # 🇨🇿 Barbora Strýcová (first round)

• # 🇺🇸 Danielle Collins (qualified)

• # 🇬🇧 Johanna Konta (qualifying competition, retired, Lucky loser )

• # 🇫🇷 Kristina Mladenovic (first round)

• # 🇰🇿 Yulia Putintseva (qualified)

• # Monica Puig (qualifying competition, lucky loser)

• # 🇷🇸 Aleksandra Krunić (first round)

• # 🇺🇸 Bernarda Pera (qualifying competition, lucky loser)

• # 🇩🇪 Tatjana Maria (qualifying competition, lucky loser)

• # 🇷🇺 Ekaterina Alexandrova (qualified)

Qualifiers
• # 🇧🇾 Aliaksandra Sasnovich

• # 🇨🇿 Kateřina Siniaková

• # 🇰🇿 Yulia Putintseva

• # 🇺🇸 Danielle Collins

• # 🇷🇺 Ekaterina Alexandrova

• # 🇦🇺 Priscilla Hon

Lucky losers
• # Monica Puig

• # 🇩🇪 Tatjana Maria

• # 🇬🇧 Johanna Konta

• # 🇺🇸 Bernarda Pera