2018 Rogers Cup – Women's singles

Simona Halep defeated Sloane Stephens in the final, 7–6(8–6), 3–6, 6–4 to win the women's singles tennis title at the 2018 Canadian Open.

Elina Svitolina was the defending champion, but lost to Stephens in the semifinals.

Seeds
The top eight seeds received a bye into the second round. • 🇷🇴 Simona Halep (champion)

• Caroline Wozniacki (second round)

• 🇺🇸 Sloane Stephens (final)

• 🇩🇪 Angelique Kerber (second round)

• 🇺🇦 Elina Svitolina (semifinals)

• 🇫🇷 Caroline Garcia (quarterfinals)

• 🇪🇸 Garbiñe Muguruza (withdrew)

• 🇨🇿 Petra Kvitová (third round)

• 🇨🇿 Karolína Plíšková (second round)

• 🇩🇪 Julia Görges (third round)

• Jeļena Ostapenko (first round)

• 🇷🇺 Daria Kasatkina (second round)

• 🇺🇸 Venus Williams (third round)

• 🇧🇪 Elise Mertens (quarterfinals)

• 🇦🇺 Ashleigh Barty (semifinals)

• 🇯🇵 Naomi Osaka (first round)

Seeds
• # 🇪🇸 Carla Suárez Navarro (qualified)

• # Donna Vekić (withdrew, still competing in Washington)

• # 🇧🇪 Kirsten Flipkens (qualified)

• # 🇰🇿 Yulia Putintseva (withdrew, still competing in Washington)

• # 🇨🇳 Wang Qiang (qualified)

• # 🇨🇿 Lucie Šafářová (qualified)

• # 🇷🇴 Monica Niculescu (qualified)

• # 🇵🇱 Magda Linette (withdrew, still competing in Washington)

• # 🇦🇺 Samantha Stosur (first round)

• # Monica Puig (qualifying competition, lucky loser)

• # 🇺🇸 Alison Riske (qualifying competition)

• # 🇺🇸 Sofia Kenin (qualifying competition)

• # 🇧🇾 Vera Lapko (first round)

• # 🇺🇸 Jennifer Brady (qualifying competition)

• # 🇺🇸 Sachia Vickery (qualifying competition, retired)

• # Stefanie Vögele (first round)

• # 🇺🇦 Kateryna Bondarenko (qualifying competition, retired)

• # 🇩🇪 Tatjana Maria (moved to main draw)

• # 🇨🇳 Zheng Saisai (withdrew, still competing in Washington)

• # 🇷🇴 Ana Bogdan (qualified)

• # 🇩🇪 Andrea Petkovic (withdrew, still competing in Washington)

• # Dalila Jakupović (qualifying competition)

• # 🇧🇪 Yanina Wickmayer (first round)

• # 🇺🇸 Bernarda Pera (qualifying competition)

Qualifiers
• # 🇪🇸 Carla Suárez Navarro

• # 🇬🇧 Katie Boulter

• # 🇧🇪 Kirsten Flipkens

• # 🇨🇿 Barbora Krejčíková

• # 🇨🇳 Wang Qiang

• # 🇨🇿 Lucie Šafářová

• # 🇷🇴 Monica Niculescu

• # 🇧🇬 Sesil Karatantcheva

• # 🇷🇺 Sofya Zhuk

• # 🇺🇸 Caroline Dolehide

• # 🇺🇸 Christina McHale

• # 🇷🇴 Ana Bogdan

Lucky loser

 * 1)  Monica Puig